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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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East Africa
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Tanzania (1)
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Madagascar (4)
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Mozambique Belt (1)
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Southern Africa
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Namibia
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Tsumeb Namibia (1)
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South Africa
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Cape Province region (1)
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Northern Cape Province South Africa
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Postmasburg South Africa (1)
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Asia
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Far East
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China
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Qinghai China (1)
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Yunnan China
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Kunming China (1)
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Japan
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Honshu
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Gifu Japan
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Toki Japan (1)
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Okayama Japan (1)
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Kamchatka Russian Federation
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Kamchatka Peninsula
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Tolbachik (11)
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Middle East
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Jordan (1)
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Russian Pacific region (5)
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Atlantic Ocean
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Australasia
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Murmansk Russian Federation
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Southern Europe
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osmium
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rare earths
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cerium (1)
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titanium (2)
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nitrogen (1)
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oxygen (5)
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phosphorus (1)
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tellurium (2)
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geochronology methods
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geologic age
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Cenozoic
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Tertiary
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Miocene
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Pliocene
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Paleogene
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Mesozoic
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Precambrian
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upper Precambrian
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Proterozoic
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volcanic rocks
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pyroclastics
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scoria (3)
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trachytes (1)
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ophiolite (1)
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metamorphic rocks
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metamorphic rocks
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garnetite (1)
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marbles (1)
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metasomatic rocks
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rodingite (1)
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schists (1)
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ophiolite (1)
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meteorites
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meteorites
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iron meteorites
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stony meteorites
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achondrites
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Martian meteorites
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SNC Meteorites
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chassignite (1)
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nakhlite (1)
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shergottite (1)
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-
-
minerals
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arsenates
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mimetite (2)
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pharmacosiderite (1)
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arsenides
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arsenopyrite (2)
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lollingite (1)
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arsenites (2)
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borates
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boracite (1)
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carbonates
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calcite (2)
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cancrinite (4)
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cerussite (1)
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leadhillite (2)
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meionite (2)
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smithsonite (1)
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witherite (1)
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-
chromates (2)
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copper minerals (5)
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halides
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chlorides
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bideauxite (1)
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boracite (1)
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mimetite (2)
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pyromorphite (1)
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vanadinite (1)
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fluorides
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bideauxite (1)
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cryolite (1)
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fluorite (1)
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humite (1)
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triplite (1)
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zunyite (1)
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hydrates (4)
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iodates (1)
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manganese minerals (2)
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minerals (28)
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molybdates
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powellite (1)
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oxides
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corundum (1)
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cuprite (1)
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ferrihydrite (2)
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gahnite (3)
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germanates (1)
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goethite (2)
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hausmannite (1)
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hematite (6)
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ilmenite (1)
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iron oxides (1)
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rutile (1)
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spinel (4)
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titanium oxides (1)
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titanomagnetite (1)
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wustite (1)
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zincite (2)
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phosphates
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apatite (2)
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autunite (2)
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chlorapatite (1)
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crandallite (1)
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fluorapatite (2)
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graftonite (1)
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hydroxylapatite (1)
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pyromorphite (1)
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turquoise (1)
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selenates (2)
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silicates
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aluminosilicates (2)
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chain silicates
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amphibole group
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charoite (1)
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pyroxene group
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clinopyroxene
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diopside (3)
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spodumene (1)
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orthopyroxene
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enstatite (2)
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wollastonite group
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feldspathoids (2)
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framework silicates
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cancrinite (4)
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barium feldspar
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plagioclase
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albite (6)
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anorthite (1)
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reedmergnerite (2)
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leucite (1)
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nepheline group
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nepheline (1)
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scapolite group
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meionite (2)
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scapolite (3)
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silica minerals
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coesite (2)
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cristobalite (1)
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moganite (2)
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quartz (8)
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tridymite (1)
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sodalite group
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genthelvite (1)
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helvite (1)
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sodalite (1)
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tugtupite (1)
-
-
zeolite group
-
analcime (2)
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clinoptilolite (2)
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faujasite (1)
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heulandite (1)
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wairakite (1)
-
-
-
magnesian silicates (4)
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orthosilicates
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nesosilicates
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braunite (1)
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garnet group
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almandine (1)
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andradite (1)
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grossular (2)
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hydrogarnet
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hydrogrossular (1)
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pyrope (1)
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phenakite group
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uranophane (2)
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zircon group
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zircon (1)
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-
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sorosilicates
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melilite group
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melilite (1)
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zunyite (1)
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ring silicates
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beryl (3)
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cordierite (1)
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milarite group
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milarite (2)
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osumilite (1)
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tourmaline group
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dravite (1)
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elbaite (3)
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schorl (1)
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uvite (1)
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sheet silicates
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chlorite group
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chamosite (1)
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chlorite (1)
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clinochlore (1)
-
-
clay minerals
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beidellite (1)
-
halloysite (2)
-
kaolinite (2)
-
nontronite (2)
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smectite (7)
-
-
clintonite (1)
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gillespite (1)
-
gyrolite (1)
-
illite (4)
-
mica group
-
biotite (1)
-
phengite (2)
-
phlogopite (1)
-
-
palygorskite (1)
-
sepiolite (2)
-
serpentine group
-
antigorite (2)
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cronstedtite (1)
-
lizardite (1)
-
serpentine (2)
-
-
stilpnomelane (1)
-
talc (2)
-
zussmanite (1)
-
-
-
sulfates
-
anglesite (2)
-
barite (4)
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bassanite (1)
-
brochantite (2)
-
celestine (1)
-
chalcanthite (3)
-
epsomite (1)
-
gypsum (3)
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jarosite (1)
-
kieserite (1)
-
langbeinite (3)
-
leadhillite (2)
-
posnjakite (1)
-
selenite (1)
-
-
sulfides
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arsenopyrite (2)
-
galena (1)
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genthelvite (1)
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helvite (1)
-
sphalerite (2)
-
-
tellurates (1)
-
tellurides (1)
-
tellurites (1)
-
tungstates
-
scheelite (1)
-
stolzite (1)
-
-
uranium minerals (5)
-
vanadates
-
vanadinite (1)
-
volborthite (1)
-
-
-
Primary terms
-
absolute age (1)
-
Africa
-
East Africa
-
Tanzania (1)
-
-
Madagascar (4)
-
Mozambique Belt (1)
-
Southern Africa
-
Namibia
-
Tsumeb Namibia (1)
-
-
South Africa
-
Cape Province region (1)
-
Northern Cape Province South Africa
-
Postmasburg South Africa (1)
-
-
-
-
-
Asia
-
Far East
-
China
-
Qinghai China (1)
-
Yunnan China
-
Kunming China (1)
-
-
-
Japan
-
Honshu
-
Gifu Japan
-
Toki Japan (1)
-
-
Okayama Japan (1)
-
-
-
-
Kamchatka Russian Federation
-
Kamchatka Peninsula
-
Tolbachik (11)
-
-
-
Middle East
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Jordan (1)
-
-
Russian Pacific region (5)
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Tajikistan (1)
-
-
Atlantic Ocean
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North Atlantic
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North Sea (1)
-
-
-
atmosphere (1)
-
Australasia
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Australia
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Broken Hill Block (1)
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Curnamona Province (1)
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New South Wales Australia (2)
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Western Australia (1)
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-
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boron
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B-11/B-10 (2)
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Canada
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Western Canada
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Athabasca Basin (1)
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Saskatchewan (1)
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-
-
carbon (1)
-
Cenozoic
-
Tertiary
-
Neogene
-
Miocene
-
upper Miocene (1)
-
-
Pliocene
-
lower Pliocene (1)
-
-
-
Paleogene
-
Paleocene
-
lower Paleocene
-
K-T boundary (1)
-
-
-
-
-
-
chemical analysis (1)
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clay mineralogy (8)
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coal deposits (1)
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construction materials
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cement materials (1)
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crust (1)
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crystal chemistry (110)
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crystal structure (206)
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crystallography (6)
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data processing (7)
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deformation (3)
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Earth (1)
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Europe
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Alps
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Eastern Alps
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Koralpe Range (3)
-
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Western Alps (1)
-
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Central Europe
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Austria
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Koralpe Range (3)
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Styria Austria (1)
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Czech Republic (3)
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Germany
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Baden-Wurttemberg Germany (1)
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Saxony Germany
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Schneeberg Germany (1)
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-
Thuringia Germany (1)
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Switzerland (1)
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-
Murmansk Russian Federation
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Khibiny Mountains (1)
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Kola Peninsula (2)
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Monchegorsk Russian Federation (1)
-
-
Ossetia (1)
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Pyrenees
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French Pyrenees (1)
-
-
Southern Europe
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1-20 OF 249 RESULTS FOR
tetrahedra
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Journal Article
Alkali Sulfates with Aphthitalite-Like Structures from Fumaroles of the Tolbachik Volcano, Kamchatka, Russia. IV. Aphthitalite–Palmierite Regular Intergrowths: Crystallography, Chemistry, and Genesis
Nadezhda V. Shchipalkina, Natalia N. Koshlyakova, Igor V. Pekov, Atali A. Agakhanov, Sergey N. Britvin, Maria A. Nazarova
Publisher: Mineralogical Association of Canada
Published: 20 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (3): 609–622.
... & Kostov-Kytin 2013 ), both possess the same principal structural unit: a 2 [ M ( T O 4 ) 2 ] layer, consisting of corner-sharing M O 6 octahedra and T O 4 tetrahedra ( Nikolova & Kostov-Kytin 2013 ) and having fully occupied M and T sites. However, the arrangements of the T O 4 tetrahedra...
Journal Article
Evanichite, Pb 6 Cr 3+ (Cr 6+ O 4 ) 2 (SO 4 )(OH) 7 FCl, from Tiger, Arizona, USA, the First Mineral Containing Both Cr 3+ and Cr 6+
Publisher: Mineralogical Association of Canada
Published: 07 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (2): 419–429.
... parameters a = 7.7651(14), c = 9.6199(17) Å, V = 502.3(2) Å 3 , and Z = 1. Its crystal structure consists of two unique Pb polyhedra [Pb1 coordinated by (5O + 3OH) and Pb2 by (5O + 2OH + F + Cl)], one M 3+ (OH) 6 octahedron ( M = Cr 3+ + Fe 3+ ), two Cr 6+ O 4 tetrahedra (Cr1 and Cr2), and one SO 4...
Journal Article
Chinleite-(Nd), NaNd(SO 4 ) 2 (H 2 O), the Nd Analogue of Chinleite-(Y) from the Markey Mine, Red Canyon, San Juan County, Utah, USA
Publisher: Mineralogical Association of Canada
Published: 07 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (2): 411–418.
Journal Article
Murphyite, Pb(TeO 4 ), the Te-Analogue of Raspite, a New Mineral from Tombstone, Arizona, USA
Publisher: Mineralogical Association of Canada
Published: 07 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (2): 401–409.
Journal Article
Dongchuanite, a new phosphate mineral with a new structure, from Dongchuan copper mine, Yunnan Province, China
Journal: Mineralogical Magazine
Published: 24 May 2023
Mineralogical Magazine (2023) 87 (4): 611–618.
...), 2.384 (35) ( $\bar{2}$ 01), 3.130 (30) ( $\bar{1}$ 21), 2.811 (30) (030) and 2.316 (18) (032). The crystal structure (solved and refined from single-crystal X-ray diffraction data, R 1 = 0.07) is a new layered structure consisting of corner-sharing tetrahedrons and octahedrons, where [PO 4 ] tetrahedra...
Journal Article
Crystal-chemical characterisation and spectroscopy of fluorcarletonite and carletonite
Journal: Mineralogical Magazine
Published: 03 March 2023
Mineralogical Magazine (2023) 87 (3): 356–368.
... consisting of two upward-pointing (u) and two downward-pointing (d) tetrahedra, and (2) an eight-membered ring consisting of alternately upward-pointing (u) and downward-pointing tetrahedra (d). The u-d arrangement in the fluorcarletonite and carletonite tetrahedra sheet is (u 2 d 2 ) 4 (udududud) 4 (see...
Journal Article
Shinarumpite, a new cobalt uranyl sulfate mineral from the Scenic mine, San Juan County, Utah, USA, structurally related to leydetite
Journal: Mineralogical Magazine
Published: 28 November 2022
Mineralogical Magazine (2023) 87 (3): 348–355.
... and Z = 4. In the structure of shinarumpite ( R 1 = 0.0336 for 2623 I > 2σ I ), linkages of pentagonal bipyramids and tetrahedra form an infinite [(UO 2 )(SO 4 ) 2 (H 2 O)] 2– sheet. Isolated Co(H 2 O) 6 octahedra and H 2 O groups occupy the interlayer region linking the sheets via an extensive...
Journal Article
Loomisite, Ba[Be 2 P 2 O 8 ]⋅H 2 O, the first natural example with the zeolite ABW-type framework, from Keystone, Pennington County, South Dakota, USA
Journal: Mineralogical Magazine
Published: 20 October 2022
Mineralogical Magazine (2023) 87 (1): 79–85.
...(11) Å, β = 91.272(5)°, V = 342.47(14) Å 3 and Z = 2. Its crystal structure is characterised by a framework of corner-sharing PO 4 and BeO 4 tetrahedra. The framework can be considered as built from the stacking of sheets consisting of 4- and 8-membered rings (4.8 2 nets) along [001] or hexagonal...
Journal Article
Nafeasite, NaFe 3+ (AsO 3 OH) 2 ⋅H 2 O, a new framework arsenate from the Torrecillas mine, Iquique Province, Chile
Anthony R. Kampf, Jochen Schlüter, Thomas Malcherek, Bianca Paulenz, Dieter Pohl, Chi Ma, Maurizio Dini, Arturo A. Molina Donoso
Journal: Mineralogical Magazine
Published: 17 June 2022
Mineralogical Magazine (2022) 86 (6): 883–890.
..., is based on a loose 3D framework of alternating AsO 3 OH tetrahedra and Fe 3+ O 6 octahedra. * Author for correspondence: Anthony R. Kampf, Email: akampf@nhm.org Associate Editor: Juraj Majzlan 16 03 2022 29 05 2022 Copyright © The Author(s), 2022. Published by Cambridge...
Journal Article
Controls on tetrahedral Fe(III) abundance in 2:1 phyllosilicates—Reply
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 September 2021
American Mineralogist (2021) 106 (9): 1536.
...Javier Cuadros; Joseph R. Michalski; M. Darby Dyar Abstract The model of Fe 3+ distribution between octahedra and tetrahedra in dioctahedral smectites by Decarreau and Petit (2014) used data from infrared analysis. From their own and other general evidence, the resulting data are likely...
Journal Article
Controls on tetrahedral Fe(III) abundance in 2:1 phyllosilicates—Discussion
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 September 2021
American Mineralogist (2021) 106 (9): 1534–1535.
... 4 3 + = Fe 3+ /(Fe 3+ +Al 3+ ) molar ratio in tetrahedra, 4 and 6 referring to tetrahedral and octahedral sites (similar relations for Al 3+ ), and a Kd (4/6) value of 0.006 was obtained from the fit of data from natural smectites formed at low temperature. This very low Kd (4/6) value...
Journal Article
Raman spectroscopic quantification of tetrahedral boron in synthetic aluminum-rich tourmaline
Martin Kutzschbach, Bernd Wunder, Iris Wannhoff, Franziska D.H. Wilke, Frédéric Couffignal, Alexander Rocholl
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 2021
American Mineralogist (2021) 106 (6): 872–882.
Journal Article
Vasilseverginite, Cu 9 O 4 (AsO 4 ) 2 (SO 4 ) 2 , a new fumarolic mineral with a hybrid structure containing novel anion-centered tetrahedral structural units
Igor V. Pekov, Sergey N. Britvin, Sergey V. Krivovichev, Vasiliy O. Yapaskurt, Marina F. Vigasina, Anna G. Turchkova, Evgeny G. Sidorov
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2021
American Mineralogist (2021) 106 (4): 633–640.
... 1 , 212). The crystal structure, solved using single-crystal X-ray diffraction data, R 1 = 0.025, is based upon complex [O 4 Cu 9 ] 10+ layers parallel to ( 1 01) that are composed of edge- and corner-sharing (OCu 4 ) tetrahedra. The topology is unprecedented in inorganic structural chemistry...
Journal Article
A structure hierarchy for silicate minerals: chain, ribbon, and tube silicates
Journal: Mineralogical Magazine
Published: 26 February 2020
Mineralogical Magazine (2020) 84 (2): 165–244.
...Maxwell C. Day; Frank C. Hawthorne Abstract A structure hierarchy is developed for chain-, ribbon- and tube-silicate based on the connectedness of one-dimensional polymerisations of (TO 4 ) n − tetrahedra, where T = Si 4+ plus P 5+ , V 5+ , As 5+ , Al 3+ , Fe 3+ , B 3+ , Be 2+ , Zn 2+ and Mg 2...
Journal Article
Dissolution of poorly soluble uranyl phosphate phases in the Metaautunite Subgroup under uranyl peroxide cage cluster forming conditions
Haylie L. Lobeck, Enrica Balboni, Connor J. Parker, Tsuyoshi A. Kohlgruber, Mengyu Xu, Sara Boukdad, Henry M. Ridder, Hrafn Traustason, Jordan K. Isner, Ewa A. Dzik, Peter C. Burns
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2020
American Mineralogist (2020) 105 (2): 182–193.
.... Each uranyl phosphate studied has a topologically identical anionic sheet of uranyl square bipyramids and phosphate tetrahedra combined with various cations (Li + , Na + , K + , Rb + , Cs + , Mg 2+ , Ca 2+ , Ba 2+ ) and water in the interlayer. Uranyl peroxides formed under many of the experimental...
Journal Article
Controls on tetrahedral Fe(III) abundance in 2:1 phyllosilicates
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2019
American Mineralogist (2019) 104 (11): 1608–1619.
... Å, respectively, from Shannon 1976 ) and divalent electric charge that does not balance efficiently the negative charge of oxide anions in corner-shared tetrahedra. Iron(III), however, with a trivalent charge and smaller radius (tetrahedral ionic radius of 0.57 Å; Whittaker and Muntus 1970 ) mitigates totally...
Journal Article
Comments on Beryl Colors and on Other Observations Regarding Iron-containing Beryls
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 15 July 2019
The Canadian Mineralogist (2019) 57 (4): 551–566.
...+ and Fe 3+ ions in neighboring T(3) tetrahedra. When both configurations are present, the crystal assumes a shade of green, depending on their relative proportion. The electrons released by the irradiation are trapped at sites which are probably associated with water molecules in the beryl channels...
Journal Article
Structural interpretation of a new twin in staurolite from Coray, Brittany, France
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 July 2019
European Journal of Mineralogy (2019) 31 (4): 785–790.
... plane leads to a highly disrupted coordination, where only half of the tetrahedra are restored. This makes a contact twin highly unlikely. The reported twin is actually a penetration twin, in which the irregular composition surface may have compensated, to some extent, the unfavourable structural match...
Includes: Supplemental Content
Journal Article
Dokuchaevite, Cu 8 O 2 (VO 4 ) 3 Cl 3 , a new mineral with remarkably diverse Cu 2+ mixed-ligand coordination environments
Oleg I. Siidra, Evgeny V. Nazarchuk, Anatoly N. Zaitsev, Yury S. Polekhovsky, Thomas Wenzel, John Spratt
Journal: Mineralogical Magazine
Published: 24 June 2019
Mineralogical Magazine (2019) 83 (5): 749–755.
..., which demonstrate the remarkable diversity of Cu 2+ mixed-ligand coordination environments. The crystal structure of dokuchaevite is based on OCu 4 tetrahedra that share common corners thus forming [O 2 Cu 6 ] 8+ single chains. Two of the eight symmetrically independent copper atoms do not form Cu–O...
Journal Article
Segelerite from the Mount Deverell variscite deposit, Western Australia. Hydrogen bonding and relationship to jahnsite
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 465–471.
... of both minerals comprise heteropolyhedral slabs of composition [ XM 1 Fe 2 3 + (OH) 2 (PO 4 ) 4 ], that are linked together via corner-sharing of PO 4 tetrahedra with isolated [ M 2(O p ) 2 (H 2 O) 4 ] octahedra. The structures differ in the mode of linkage of the M 2 octahedra, which is via trans O p...
Includes: Supplemental Content
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