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Journal
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GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Cape Verde Islands (1)
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Central Africa
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Rwanda (1)
-
-
East Africa
-
Kenya (2)
-
Mozambique (1)
-
Tanzania (3)
-
-
North Africa
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Morocco (1)
-
-
Southern Africa
-
Namibia (1)
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South Africa
-
Northern Cape Province South Africa (1)
-
Transvaal region (1)
-
-
-
-
Arctic region
-
Greenland
-
Kangerlussuaq (1)
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-
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Asia
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Far East
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China
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Guangdong China (1)
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Inner Mongolia China
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Bayan Obo China (1)
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Liaoning China (1)
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Japan
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Honshu
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Niigata Japan (1)
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Himalayas
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High Himalayan Crystallines (1)
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Indian Peninsula
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India
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Doda India
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Kishtwar India (1)
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Jammu and Kashmir
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Jammu (1)
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Kishtwar India (1)
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Kamchatka Russian Federation
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Kamchatka Peninsula
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Tolbachik (2)
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Middle East
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Israel
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Negev (1)
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Russian Pacific region (1)
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Atlantic Ocean Islands
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Cape Verde Islands (1)
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Australasia
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Australia
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New South Wales Australia (1)
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South Australia
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Olary Domain (1)
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Western Australia (1)
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New Zealand
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Southland New Zealand
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Fiordland (1)
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Canada
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Eastern Canada
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Maritime Provinces
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New Brunswick
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Moncton Basin (1)
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Quebec (2)
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Commonwealth of Independent States
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Russian Federation
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Kamchatka Russian Federation
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Kamchatka Peninsula
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Tolbachik (2)
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Russian Pacific region (1)
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Urals (1)
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Europe
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Alps
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Central Alps
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Rhaetian Alps (1)
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Carpathians
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Matra Mountains (1)
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Slovakian Carpathians
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Low Tatra Mountains (1)
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Western Carpathians (1)
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Central Europe
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Czech Republic
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Bohemia
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Pribram Czech Republic (2)
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Germany
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Baden-Wurttemberg Germany
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Kaiserstuhl (1)
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Bavaria Germany
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Upper Palatinate (2)
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Eifel (1)
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Rhineland-Palatinate Germany (1)
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Hungary
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Borzsony Mountains (1)
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Matra Mountains (1)
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Slovakia
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Slovakian Carpathians
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Low Tatra Mountains (1)
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Switzerland (1)
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Pyrenees (1)
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Rhenish Schiefergebirge
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Eifel (1)
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Southern Europe
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Greece
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Greek Aegean Islands
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Cyclades
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Tinos (1)
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-
-
Iberian Peninsula
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Portugal (1)
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Italy
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Apennines
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Apuane Alps (1)
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Latium Italy
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Alban Hills (1)
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Rome Italy (1)
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Liguria Italy (2)
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Lombardy Italy (2)
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Piemonte Italy
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Acceglio Italy (1)
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Sicily Italy
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Hyblean Plateau (1)
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Tuscany Italy
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Apuane Alps (1)
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Valle d'Aosta Italy (1)
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Macedonia (1)
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Western Europe
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Belgium (1)
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France (1)
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Scandinavia
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Sweden
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Bergslagen (1)
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-
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Kings Mountain (1)
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Mediterranean region
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Aegean Islands
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Greek Aegean Islands
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Cyclades
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Tinos (1)
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South America
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Argentina (1)
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Bolivia
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Potosi Bolivia (1)
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Brazil
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Bahia Brazil (1)
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Minas Gerais Brazil (2)
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Pernambuco Brazil (1)
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Chile
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Tarapaca Chile (1)
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United States
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Colorado (1)
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Maine
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Oxford County Maine (1)
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New Hampshire
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Grafton County New Hampshire (1)
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New Mexico
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Colfax County New Mexico (1)
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Picuris Range (1)
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Rio Arriba County New Mexico (1)
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Taos County New Mexico (1)
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North Carolina
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Cleveland County North Carolina (2)
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Texas
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Llano Uplift (1)
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Utah
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Juab County Utah (1)
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San Juan County Utah (2)
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Tintic mining district (1)
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Vermont
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Orange County Vermont (1)
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commodities
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gems (5)
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metal ores
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antimony ores (2)
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base metals (1)
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copper ores (2)
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gold ores (1)
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lead-zinc deposits (1)
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silver ores (1)
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uranium ores (1)
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mineral deposits, genesis (3)
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ornamental materials (1)
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elements, isotopes
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boron (1)
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hydrogen (3)
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isotope ratios (1)
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isotopes
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Sm-147/Nd-144 (1)
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stable isotopes
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Nd-144/Nd-143 (1)
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Sm-147/Nd-144 (1)
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metals
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actinides
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uranium (1)
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alkali metals
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potassium (1)
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sodium (1)
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alkaline earth metals
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strontium (1)
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aluminum (3)
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antimony (1)
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chromium (2)
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copper (5)
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gold (1)
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iron
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ferric iron (7)
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ferrous iron (4)
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-
manganese (6)
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mercury (1)
-
rare earths
-
lanthanum (1)
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neodymium
-
Nd-144/Nd-143 (1)
-
Sm-147/Nd-144 (1)
-
-
samarium
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Sm-147/Nd-144 (1)
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-
-
titanium (5)
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tungsten (1)
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vanadium (4)
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zinc (1)
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zirconium (1)
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selenium (1)
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sulfur (1)
-
-
geochronology methods
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optical mineralogy (9)
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radiation damage (1)
-
-
geologic age
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Paleozoic
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Carboniferous
-
Mississippian
-
Windsor Group (1)
-
-
-
-
Precambrian (1)
-
-
igneous rocks
-
igneous rocks
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kimberlite (1)
-
plutonic rocks
-
granites (10)
-
lamproite (1)
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pegmatite (11)
-
syenites
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nepheline syenite (2)
-
-
ultramafics
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peridotites (1)
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-
-
volcanic rocks
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andesites (1)
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basalts
-
ocean-island basalts (1)
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dacites (1)
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nephelinite
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olivine nephelinite (1)
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phonolites (1)
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ophiolite (1)
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-
metamorphic rocks
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metamorphic rocks
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marbles (1)
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metasedimentary rocks
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metachert (1)
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metasomatic rocks
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skarn (1)
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migmatites (1)
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schists
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tourmalinite (1)
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ophiolite (1)
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minerals
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arsenates (2)
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arsenides
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arsenopyrite (1)
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arsenites (1)
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bismuthides (1)
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borates (2)
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carbonates
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pyroaurite (1)
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spurrite (1)
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halides
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chlorides
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halite (1)
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hydrates (3)
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minerals (20)
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native elements (2)
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oxides
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hydroxides (1)
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niobates
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tantalates
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uraninite (1)
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phosphates
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apatite (1)
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fluorapatite (2)
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graftonite (1)
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monazite (1)
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rockbridgeite (2)
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triphylite (1)
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vivianite (2)
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xenotime (1)
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selenides
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eskebornite (1)
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umangite (1)
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silicates
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chain silicates
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amphibole group
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alkalic amphibole (1)
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clinoamphibole
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arfvedsonite (2)
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richterite (1)
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riebeckite (2)
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astrophyllite (1)
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bavenite (1)
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plancheite (1)
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pyroxene group
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clinopyroxene
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aegirine (2)
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augite (1)
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clinoenstatite (1)
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diopside (1)
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spodumene (2)
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titanaugite (1)
-
-
orthopyroxene
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enstatite (1)
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protoenstatite (1)
-
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
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adularia (1)
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microcline (1)
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orthoclase (1)
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sanidine (1)
-
-
plagioclase
-
labradorite (2)
-
-
-
silica minerals
-
amethyst (1)
-
quartz
-
smoky quartz (1)
-
-
-
zeolite group
-
analcime (1)
-
-
-
orthosilicates
-
nesosilicates
-
andalusite (4)
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chloritoid (1)
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dumortierite (1)
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euclase (1)
-
garnet group
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andradite (1)
-
spessartine (1)
-
-
kyanite (1)
-
olivine group
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fayalite (1)
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olivine (1)
-
-
sillimanite (1)
-
spurrite (1)
-
staurolite (2)
-
-
sorosilicates
-
chevkinite group
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perrierite (1)
-
-
epidote group
-
epidote (1)
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zoisite (2)
-
-
lawsonite (1)
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vesuvianite (2)
-
-
-
ring silicates
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beryl (2)
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cordierite (2)
-
milarite group
-
milarite (1)
-
-
tourmaline group
-
elbaite (2)
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schorl (1)
-
-
-
sheet silicates
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chlorite group
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chlorite (1)
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clay minerals
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dickite (1)
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clintonite (1)
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mica group
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annite (1)
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biotite (3)
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lepidolite (1)
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muscovite (4)
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phlogopite (5)
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palygorskite (1)
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serpentine group
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antigorite (1)
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-
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sulfates
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anhydrite (2)
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chalcanthite (1)
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copiapite (1)
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coquimbite (1)
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halotrichite (1)
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hexahydrite (1)
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iron sulfates (1)
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jarosite (1)
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roemerite (1)
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rozenite (1)
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selenite (1)
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sulfides
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arsenopyrite (1)
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marcasite (1)
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oldhamite (1)
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pyrite (4)
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sphalerite (1)
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valleriite (1)
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sulfosalts
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sulfantimonites
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tetrahedrite (1)
-
-
sulfobismuthites
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wittichenite (1)
-
-
-
tellurates (1)
-
uranium minerals (2)
-
-
Primary terms
-
Africa
-
Cape Verde Islands (1)
-
Central Africa
-
Rwanda (1)
-
-
East Africa
-
Kenya (2)
-
Mozambique (1)
-
Tanzania (3)
-
-
North Africa
-
Morocco (1)
-
-
Southern Africa
-
Namibia (1)
-
South Africa
-
Northern Cape Province South Africa (1)
-
Transvaal region (1)
-
-
-
-
Arctic region
-
Greenland
-
Kangerlussuaq (1)
-
-
-
Asia
-
Far East
-
China
-
Guangdong China (1)
-
Inner Mongolia China
-
Bayan Obo China (1)
-
-
Liaoning China (1)
-
-
Japan
-
Honshu
-
Niigata Japan (1)
-
-
-
-
Himalayas
-
High Himalayan Crystallines (1)
-
-
Indian Peninsula
-
India
-
Doda India
-
Kishtwar India (1)
-
-
-
Jammu and Kashmir
-
Jammu (1)
-
Kishtwar India (1)
-
-
-
Kamchatka Russian Federation
-
Kamchatka Peninsula
-
Tolbachik (2)
-
-
-
Middle East
-
Israel
-
Negev (1)
-
-
-
Russian Pacific region (1)
-
-
Atlantic Ocean Islands
-
Cape Verde Islands (1)
-
-
Australasia
-
Australia
-
New South Wales Australia (1)
-
South Australia
-
Olary Domain (1)
-
-
Western Australia (1)
-
-
New Zealand
-
Southland New Zealand
-
Fiordland (1)
-
-
-
-
boron (1)
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
New Brunswick
-
Moncton Basin (1)
-
-
-
Quebec (2)
-
-
-
crystal chemistry (38)
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crystal growth (3)
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crystal structure (59)
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crystallography (1)
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deformation (1)
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economic geology (1)
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education (1)
-
Europe
-
Alps
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Central Alps
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Rhaetian Alps (1)
-
-
-
Carpathians
-
Matra Mountains (1)
-
Slovakian Carpathians
-
Low Tatra Mountains (1)
-
-
Western Carpathians (1)
-
-
Central Europe
-
Czech Republic
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Bohemia
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Pribram Czech Republic (2)
-
-
-
Germany
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Baden-Wurttemberg Germany
-
Kaiserstuhl (1)
-
-
Bavaria Germany
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Upper Palatinate (2)
-
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Eifel (1)
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Rhineland-Palatinate Germany (1)
-
-
Hungary
-
Borzsony Mountains (1)
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Matra Mountains (1)
-
-
Slovakia
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Slovakian Carpathians
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Low Tatra Mountains (1)
-
-
-
Switzerland (1)
-
-
Pyrenees (1)
-
Rhenish Schiefergebirge
-
Eifel (1)
-
-
Southern Europe
-
Greece
-
Greek Aegean Islands
-
Cyclades
-
Tinos (1)
-
-
-
-
Iberian Peninsula
-
Portugal (1)
-
-
Italy
-
Apennines
-
Apuane Alps (1)
-
-
Latium Italy
-
Alban Hills (1)
-
Rome Italy (1)
-
-
Liguria Italy (2)
-
Lombardy Italy (2)
-
Piemonte Italy
-
Acceglio Italy (1)
-
-
Sicily Italy
-
Hyblean Plateau (1)
-
-
Tuscany Italy
-
Apuane Alps (1)
-
-
Valle d'Aosta Italy (1)
-
-
Macedonia (1)
-
-
Western Europe
-
Belgium (1)
-
France (1)
-
Scandinavia
-
Sweden
-
Bergslagen (1)
-
-
-
-
-
foliation (2)
-
fractures (2)
-
gems (5)
-
geochemistry (5)
-
hydrogen (3)
-
igneous rocks
-
kimberlite (1)
-
plutonic rocks
-
granites (10)
-
lamproite (1)
-
pegmatite (11)
-
syenites
-
nepheline syenite (2)
-
-
ultramafics
-
peridotites (1)
-
-
-
volcanic rocks
-
andesites (1)
-
basalts
-
ocean-island basalts (1)
-
-
dacites (1)
-
nephelinite
-
olivine nephelinite (1)
-
-
phonolites (1)
-
-
-
inclusions (5)
-
intrusions (2)
-
isotopes
-
radioactive isotopes
-
Sm-147/Nd-144 (1)
-
-
stable isotopes
-
Nd-144/Nd-143 (1)
-
Sm-147/Nd-144 (1)
-
-
-
magmas (1)
-
mantle (1)
-
Mediterranean region
-
Aegean Islands
-
Greek Aegean Islands
-
Cyclades
-
Tinos (1)
-
-
-
-
-
metal ores
-
antimony ores (2)
-
base metals (1)
-
copper ores (2)
-
gold ores (1)
-
lead-zinc deposits (1)
-
silver ores (1)
-
uranium ores (1)
-
-
metals
-
actinides
-
uranium (1)
-
-
alkali metals
-
potassium (1)
-
sodium (1)
-
-
alkaline earth metals
-
strontium (1)
-
-
aluminum (3)
-
antimony (1)
-
chromium (2)
-
copper (5)
-
gold (1)
-
iron
-
ferric iron (7)
-
ferrous iron (4)
-
-
manganese (6)
-
mercury (1)
-
rare earths
-
lanthanum (1)
-
neodymium
-
Nd-144/Nd-143 (1)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
titanium (5)
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tungsten (1)
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vanadium (4)
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zinc (1)
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zirconium (1)
-
-
metamorphic rocks
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marbles (1)
-
metasedimentary rocks
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metachert (1)
-
-
metasomatic rocks
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skarn (1)
-
-
migmatites (1)
-
schists
-
tourmalinite (1)
-
-
-
metamorphism (2)
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metasomatism (4)
-
mineral deposits, genesis (3)
-
mineralogy (15)
-
minerals (20)
-
Paleozoic
-
Carboniferous
-
Mississippian
-
Windsor Group (1)
-
-
-
-
paragenesis (5)
-
potash (1)
-
Precambrian (1)
-
quartz crystal (1)
-
sedimentary rocks
-
chemically precipitated rocks
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evaporites (2)
-
-
-
selenium (1)
-
South America
-
Argentina (1)
-
Bolivia
-
Potosi Bolivia (1)
-
-
Brazil
-
Bahia Brazil (1)
-
Minas Gerais Brazil (2)
-
Pernambuco Brazil (1)
-
-
Chile
-
Tarapaca Chile (1)
-
-
-
spectroscopy (9)
-
structural analysis (1)
-
sulfur (1)
-
United States
-
Colorado (1)
-
Maine
-
Oxford County Maine (1)
-
-
New Hampshire
-
Grafton County New Hampshire (1)
-
-
New Mexico
-
Colfax County New Mexico (1)
-
Picuris Range (1)
-
Rio Arriba County New Mexico (1)
-
Taos County New Mexico (1)
-
-
North Carolina
-
Cleveland County North Carolina (2)
-
-
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1-20 OF 102 RESULTS FOR
pleochroism
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Journal Article
A simple method to create mineral mounts in thin section for teaching optical mineralogy
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2025
American Mineralogist (2025) 110 (2): 328–335.
...Matthew J. Kohn Abstract Mineral separates mounted in thin section help introduce mineralogy students to concepts of relief, color, pleochroism, and birefringence and serve as reference materials both for research and teaching. Here, a simple method is described to produce materials that can...
Includes: Supplemental Content
Journal Article
Hanswilkeite, KFeS 2 , a new peralkaline sulfide mineral
Sergey N. Britvin, Mikhail N. Murashko, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin, Yevgeny Vapnik, Natalia S. Vlasenko, Yulia S. Shelukhina, Vladimir N. Bocharov
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 11 October 2024
American Mineralogist (2024)
... density is 2.654 g·cm -3 . The Raman spectrum contains the following bands: 379, 357, 289, 236, 167, 131 and 124 cm -1 . In reflected light, the mineral has very strong pleochroism from yellow-pink to dark-grey. Anisotropy is very strong, ∆ R 589 = 69 %. Reflectance values for COM required wavelengths...
Journal Article
Bimbowrieite, NaMgFe 3+ 5 (PO 4 ) 4 (OH) 6 ⋅2H 2 O, a new dufrénite-group mineral from the White Rock No.2 quarry, South Australia, Australia
Journal: Mineralogical Magazine
Published: 13 November 2023
Mineralogical Magazine (2024) 88 (1): 90–96.
Journal Article
Jingwenite-(Y) from the Yushui Cu deposit, South China: The first occurrence of a V-HREE-bearing silicate mineral
Peng Liu, Xiangping Gu, Wenlan Zhang, Huan Hu, Xiaodan Chen, Xiaolin Wang, Wenlei Song, Miao Yu, Nigel J. Cook
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 03 January 2023
American Mineralogist (2023) 108 (1): 192–196.
...) (white light), and 2 V (calculated) = 83°. The dispersion is medium with r < v, and the pleochroism is with X = light brown, Y = brown, Z = dark brown. The color, streak, luster, and hardness (Mohs) are light brown, yellowish gray, vitreous, and 4½–5, respectively. Jingwenite-(Y) is monoclinic...
Journal Article
Color effects of Cu nanoparticles in Cu-bearing plagioclase feldspars
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 2022
American Mineralogist (2022) 107 (12): 2188–2200.
...-bearing plagioclase, as a function of particle size and shape, is also calculated from the computed extinction spectra. The colors and pleochroism observed in natural and treated Cu-bearing plagioclase can be explained from the computational results. The enigmatic green colors in some precious Oregon...
Journal Article
Mn 3+ and the pink color of gem-quality euclase from northeast Brazil
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 489–494.
...Lætitia Gilles-Guéry; Laurence Galoisy; Jurgen Schnellrath; Benoit Baptiste; Georges Calas Abstract Pink euclase of gem quality and centimeter size, presenting an unusual pink-orange coloration and a pink to orange pleochroism, was discovered near Livramento de Nossa Senhora, in Bahia State, Brazil...
Journal Article
Geochemistry of the Biotite from Pegmatites of Kudi Valley, Paddar area, District Kishtwar, Jammu and Kashmir
Publisher: Geological Society of India
Published: 01 March 2020
Jour. Geol. Soc. India (2020) 95 (3): 279–285.
... grains show strong pleochroism from light greenish yellow to dark greenish brown and are highly fractured ( Fig. 3d ). Fig. 3. Petrography of pegmatite shows (a) Plagioclase grain showing zoning; (b) Granophyric texture at contact between perthetic Kfeldspar, plagioclase and quartz; (c...
Journal Article
Elasmochloite, Na 3 Cu 6 BiO 4 (SO 4 ) 5 , a new fumarolic mineral from the Tolbachik volcano, Kamchatka, Russia
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1025–1032.
.... It is transparent, green, with vitreous lustre. The calculated density ( D calc ) is 3.844 g cm −3 . Elasmochloite is optically uniaxial or pseudo-unixial (−), α = 1.611(2), β = γ = 1.698(2), 2 V ≈ 0°. Pleochroism is strong, Z ≈ Y (grass-green) > X (turquoise-blue). The chemical composition obtained by electron...
Includes: Supplemental Content
Journal Article
Fe-rich antigorite: a rock-forming mineral from low-temperature/high-pressure meta-ophicarbonates
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 July 2019
European Journal of Mineralogy (2019) 31 (4): 775–784.
... microscopy (TEM), and its mineral chemistry has been investigated by means of wavelength-dispersive and TEM-based energy-dispersive spectrometry. In thin section, Fe-rich antigorite is characterized by a strong, peculiar pleochroism (α = green–dark green; γ = bright-yellow–orange). It occurs in both mesh...
Includes: Supplemental Content
Journal Article
Ferrirockbridgeite, ( Fe 0.67 3 + □ 0.33 ) 2 (Fe 3+ ) 3 (PO 4 ) 3 (OH) 4 (H 2 O), and the oxidation mechanism for rockbridgeite-group minerals
Ian Edward Grey, Anthony R. Kampf, Erich Keck, John D. Cashion, Colin M. MacRae, Yesim Gozukara, Finlay L. Shanks
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 585–594.
... > v . The optical orientation is X = c , Y = a , Z = b . The pleochroism is X = yellow brown, Y = olive brown, Z = dark olive green; Z > Y > X . Crystal structure refinements on ferrirockbridgeite and other oxidized rockbridgeite-group species, including type rockbridgeite and type frondelite...
Includes: Supplemental Content
Journal Article
The rockbridgeite group approved and a new member, ferrorockbridgeite, (Fe 2+ ,Mn 2+ ) 2 (Fe 3+ ) 3 (PO 4 ) 3 (OH) 4 (H 2 O), described from the Hagendorf Süd pegmatite, Oberpfalz, Bavaria
Ian E. Grey, Anthony R. Kampf, Erich Keck, John D. Cashion, Colin M. MacRae, Yesim Gozukara, Vanessa K. Peterson, Finlay L. Shanks
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 March 2019
European Journal of Mineralogy (2019) 31 (2): 389–397.
... = 1.781(calc), γ = 1.797(3) (white light) and 2 V (meas.) = 87(1)° from extinction data. The optical orientation is X = c , Y = a , Z = b . The pleochroism is X = blue green, Y = olive green, Z = yellow brown; X ≈ Y > Z . 21 08 2018 17 10 2018 18 10 2018 © 2018 E...
Includes: Supplemental Content
Journal Article
Jahnsite-(MnMnZn), a new jahnsite-group mineral, and formal approval of the jahnsite group
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 January 2019
European Journal of Mineralogy (2019) 31 (1): 167–172.
... cleavage parallel to {001} and Mohs’ hardness of about 4. The measured density is 2.89(2) g cm −3 . Optically, it is biaxial (+), with α = 1.655(2), β = 1.662(2), γ = 1.673(2) (white light); 2 V = 78(1)°; pleochroism: X nearly colourless, Y and Z beige; X < Y ≈ Z . Electron microprobe analyses gave...
Journal Article
Manganflurlite, Zn Mn 3 2 + Fe 3+ (PO 4 ) 3 (OH) 2 (H 2 O) 7 ·2H 2 O, a new schoonerite-related mineral from the Hagendorf-Süd pegmatite
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 January 2019
European Journal of Mineralogy (2019) 31 (1): 127–134.
..., the mineral dissolves rapidly in dilute HCl. Optically, manganflurlite is biaxial (–), with α = 1.623(calc), β = 1.649(2), γ = 1.673(2) (white light); 2 V = 86(1)°. The dispersion is r > v , slight; the optical orientation is X = c , Y = b , Z = a . The pleochroism is X = pale yellow brown, Y = orange...
Includes: Supplemental Content
Journal Article
Tantalowodginite, (Mn 0.5 □ 0.5 )TaTa 2 O 8 , a New Mineral Species from the Emmons Pegmatite, Uncle Tom Mountain, Maine, U.S.A.
Sarah L. Hanson, Alexander U. Falster, William B “Skip” Simmons, Raymond Sprague, Pietro Vignola, Nicola Rotiroti, Sergio Andó, Frédéric Hatert
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 23 October 2018
The Canadian Mineralogist (2018) 56 (4): 543–553.
... (+) and has a 2 V angle of ≅ 70° with strong dispersion. It exhibits weak to moderate pleochroism: orangish-yellow parallel to cleavage and greenish-yellow perpendicular to cleavage on (010). The measured Z ∧ c is 5–12°. The birefringence is strong to extreme; interference colors are very high-order tints...
Journal Article
Meitnerite, (NH 4 )(UO 2 )(SO 4 )(OH)·2H 2 O, a new uranyl-sulfate mineral with a sheet structure
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 September 2018
European Journal of Mineralogy (2018) 30 (5): 999–1006.
..., meitnerite is biaxial (–), with α = 1.568(2), β = 1.589(2), γ = 1.607(2) (white light); 2 V = 84(1)°. The dispersion is r > v , moderate, The optical orientation is X ∧ b = 26°, Y ∧ a = 15°, Z ∧ c = 53°. The pleochroism is X nearly colourless, Z pale green yellow, Y light green yellow; X < Z < Y...
Includes: Supplemental Content
Journal Article
Pararaisaite, the Dimorph of Raisaite, from the North Star Mine, Tintic, Utah, Usa
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 September 2018
The Canadian Mineralogist (2018) 56 (5): 811–820.
...: perfect on {001} and good on {100}. The measured density is 2.85(2) g/cm 3 . Pararaisaite is biaxial (+) with α = 1.600(2), β = 1.616(2), γ = 1.713(3) (white light); 2 V = 47(1)°; slight r > v dispersion; orientation Z = b , X ≈ a , Y ≈ c ; and pleochroism X very pale purple, Y purple, Z blue green ( X...
Journal Article
Lavinskyite-1 M , K(LiCu)Cu 6 (Si 4 O 11 ) 2 (OH) 4 , the monoclinic MDO equivalent of lavinskyite-2 O (formerly lavinskyite), from the Cerchiara manganese mine, Liguria, Italy
Uwe Kolitsch, Stefano Merlino, Donato Belmonte, Cristina Carbone, Roberto Cabella, Gabriella Lucchetti, Marco E. Ciriotti
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 July 2018
European Journal of Mineralogy (2018) 30 (4): 811–820.
... is ∼5. The calculated density is 3.613 g/cm 3 (for empirical formula). Optically, it is biaxial positive, with α = 1.674(2); β = 1.692(3) and γ = 1.730(3); 2 V γ is very large, ∼75° (est.), 2 V γ (calc.) = 70°. Pleochroism is moderate: X (pale) blue, Y pale blue and Z pale blue with faint greenish tint...
Includes: Supplemental Content
Journal Article
Ferriperbøeite-(Ce), [CaCe 3 ] ∑=4 [Fe 3+ Al 2 Fe 2+ ] ∑=4 [Si 2 O 7 ][SiO 4 ] 3 O(OH) 2 , a new member of the polysomatic epidote–törnebohmite series from the Nya Bastnäs Fe-Cu-REE deposit, Sweden
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 537–544.
Includes: Supplemental Content
Journal Article
Greenlizardite, (NH 4 )Na(UO 2 ) 2 (SO 4 ) 2 (OH) 2 ·4H 2 O, a new mineral with phosphuranylite-type uranyl sulfate sheets from Red Canyon, San Juan County, Utah, USA
Journal: Mineralogical Magazine
Published: 01 April 2018
Mineralogical Magazine (2018) 82 (2): 401–411.
...°. Dispersion is moderate, r < v . Pleochroism is X = very pale yellow green, Y = pale yellow green and Z = light yellow green; X < Y < Z . The optical orientation is X ≈ c , Y ≈ a and Z ≈ b* . The Raman spectrum exhibits bands attributable to both sulfate and uranyl groups. Electron probe...
Journal Article
Bytízite, a new Cu-Sb selenide from Příbram, Czech Republic
Journal: Mineralogical Magazine
Published: 01 February 2018
Mineralogical Magazine (2018) 82 (1): 199–209.
... density is 6.324 g cm –3 . In reflected light bytízite is grey with a yellowish hue, yellowish and brownish. Bireflectance and pleochroism are weak. Anisotropy is strong with grey to brownish rotation tints. Internal reflections were not observed. The empirical formula, based on electron-microprobe...
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