1-20 OF 71 RESULTS FOR

schorl

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 30 September 2019
The Canadian Mineralogist (2019) 57 (5): 745–747.
... paragenetic types: (i) Ca-enriched schorl-dravite associated with Kfs + Pl/Ab + Qz ± Ttn, Bt from several localities of intragranitic NYF pegmatites of the Třebíč Pluton, Moldanubian Zone, Czech Republic ( Novák et al . 2011 ); (ii) schorl to bosiite as a product of hydrothermal replacement of biotite...
FIGURES
Series: Geological Society, London, Special Publications
Published: 25 September 2019
DOI: 10.1144/SP481-2017-167
EISBN: 9781786204264
... of 3 s per step, and measurement ranges from 2° to 65° 2 θ . Diffraction patterns were fitted, and unit-cell parameters were refined with Bruker DIFFRACplus TOPAS software using the structural model of schorl ( Bosi et al. 2005 : sample L4d). Refined unit-cell parameters allowed the calculation...
FIGURES | View All (12)
Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 919–928.
... behaviour and to carry out kinetics analysis for Fe-rich tourmaline (schorl). X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetry-Differential Scanning Calorimetry (TG-DSC) were applied to characterize the thermal behaviour. The Friedman, Flynn-Wall-Ozawa, modified...
FIGURES | View All (8)
Journal Article
Journal: Lithosphere
Published: 20 December 2018
Lithosphere (2019) 11 (1): 91–128.
... parts include 1 cm schorl prisms and muscovite. Schorl-rich layers occur but are rare in the upper part of the footwall ( Fig. 7 ), and locally the coarse-grained granite is foliated or protoclastic ( Fig. 8 ). The Sr i of the lower part of the footwall zone is 0.7042 (R.J. Fleck, 2009, personal commun...
FIGURES | View All (45)
Journal Article
Published: 23 October 2018
The Canadian Mineralogist (2018) 56 (4): 425–449.
... are famous for spectacular mineral specimens of schorl, foitite, aquamarine, topaz, fluorite, and jeremejevite. Mineral samples from three areas where artisanal mining exposed miarolitic cavities were examined: Lion's Head (LH), Hohenstein Gorge (HG), and Tubusis (TB). Tourmaline, biotite, and associated...
FIGURES | View All (19)
Journal Article
Published: 28 February 2018
Mineralogical Magazine (2018) 82 (4): 913–928.
...Adam Pieczka; Andreas Ertl; Mateusz P. Sęk; Diana Twardak; Sylwia Zelek; Eligiusz Szełęg; Gerald Giester ABSTRACT Yellowish dravitic tourmaline (dominated by the oxy-dravite component) associated with secondary fluor-dravite/fluor-schorl and dravite/schorl tourmalines was found in a quartz vein...
FIGURES | View All (7)
Series: Clay Minerals Society
Published: 01 January 2018
DOI: 10.1346/CMS-WLS-22.8
EISBN: 9781881208495
... are less than trace amounts of pyrite, anatase, and rutile. Sample Kaolinite Illite Chlorite Quartz K-feldspar Ankerite Siderite Schorl 1 22.1 19.2 0.0 53.7 3.0 0.5 0.0 1.1 2 25.1 16.9 0.0 53.1 2.2 0.3 0.0 1.5 3 28.8 9.0 0.0 54.7 3.3 0.3 0.5 2.7 4 34.3...
FIGURES | View All (44)
Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 257–267.
..., and a transversely zoned specimen consisting of small crystals covering the single-crystal main body. The results show that the most abundant tourmaline species are schorl deficient in W-site OH ( W OH) and Y Al-rich schorl that additionally contains minor amounts of Y Mg and/or Y Li. In addition, X Na-rich foitite...
Journal Article
Published: 01 April 2017
American Mineralogist (2017) 102 (4): 876–899.
... and cavities. The tourmalines are mostly schorl (Fe-rich) and foitite, with an average end-member component of schorl 45 dravite 6 tsilaisite 1 uvite 0 Fe-uvite 3 foitite 31 Mg-foitite 4 olenite 10 . Element substitutions of the tourmalines are controlled by FeMg −1 , Y Al X □(R 2+ Na) −1 , and minor Y AlO(R 2...
FIGURES | View All (17)
Journal Article
Published: 01 May 2016
The Canadian Mineralogist (2016) 54 (3): 661–679.
... basement rocks along the P2 fault: early oxy-schörl [(Na 0.47 □ 0.37 Ca 0.16 )(Fe 2+ 1.30 Al 0.91 Mg 0.72 Ti 0.07 )Al 6 (Si 5.79 Al 0.21 O 18 )(BO 3 ) 3 OH 3 (O 0.63 OH 0.29 F 0.08 ), where □ = vacancy] of metamorphic-anatectic origin, hydrothermal oxy-dravite [(Na 0.57 Ca 0.23 □ 0.18 K 0.02 )(Mg 1.93 Fe 2...
FIGURES | View All (8)
Journal Article
Published: 01 March 2016
European Journal of Mineralogy (2016) 28 (1): 163–177.
...Andreas Ertl; Uwe Kolitsch; M. Darby Dyar; Hans-Peter Meyer; George R. Rossman; Darrell J. Henry; Markus Prem; Thomas Ludwig; Lutz Nasdala; Christian L. Lengauer; Ekkehart Tillmanns; Gerhard Niedermayr Abstract Fluor-schorl, NaFe 2+ 3 Al 6 Si 6 O 18 (BO 3 ) 3 (OH) 3 F, is a new mineral species...
FIGURES | View All (5)
Journal Article
Published: 17 November 2015
The Canadian Mineralogist (2015) 53 (3): 571–590.
... likely occurs in arrangements with W OH. §   Corresponding author e-mail address : bacikp@fns.uniba.sk 8 10 2014 21 4 2015 2015 Mineralogical Association of Canada tourmaline supergroup schorl dravite disorder octahedral sites unit-cell parameters bond-lengths bond...
FIGURES | View All (15)
Journal Article
Published: 01 November 2015
The Canadian Mineralogist (2015) 53 (6): 1035–1048.
... with albite and quartz in the Oldřich pegmatite (distal cookeite type), Dolní Bory-Hatě, Bory pegmatite district, Moldanubian Zone, Czech Republic. The mineral assemblages of the Bory pegmatites with common Al,Fe-rich minerals (annite, schorl, sekaninaite, andalusite, diaspore, ilmenite, and almandine...
FIGURES | View All (4)
Journal Article
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1434–1451.
...Renata Čopjaková; Radek Škoda; Michaela Vašinová Galiová; Milan Novák; Jan Cempírek Abstract Primary black thick-prismatic Al-rich schorl to rare fluor-schorl (TurP1), locally overgrown by brownish-green Li-rich fluor-schorl to fluor-elbaite (TurP2) from the Kracovice pegmatite (mixed NYF+LCT...
FIGURES | View All (10)
Journal Article
Published: 01 June 2015
Mineralogical Magazine (2015) 79 (3): 515–528.
...Ferdinando Bosi; Giovanni B. Andreozzi; Ulf Hålenius; Henrik Skogby Abstract An experimental study of an Al-rich schorl sample from Cruzeiro mine (Minas Gerais, Brazil) was carried out using electron microprobe analysis, structural refinement and Mössbauer, infrared and optical absorption...
FIGURES | View All (4)
Journal Article
Published: 01 February 2015
Mineralogical Magazine (2015) 79 (1): 89–101.
... Island, Italy, in association with quartz, K-feldspar, plagioclase, elbaite, schorl, fluor-elbaite and tsilaisite. Crystals are greenish yellow with a vitreous lustre, sub-conchoidal fracture and white streak. Fluor-tsilaisite has a Mohs hardness of ~7 and a calculated density of 3.134 g/cm 3 . In plane...
FIGURES
Journal Article
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 285–301.
... amphibole (K-rich magnesio-hornblende to ferro-hastingsite), plagioclase An 30–42 and titanite, along with accessory feruvitic tourmaline—Ca-rich schorl to Na-rich feruvite—are indicators of Ca and Fe-contamination from the host rock. Interstitial tourmaline from the outer unit (TU1) and tourmaline from...
FIGURES | View All (6)
Journal Article
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 129–164.
... as the only accessory minerals, but 12 dikes are more fractionated and correspond to beryl-columbite, beryl-columbite-phosphate, and lepidolite subtypes. Detailed study of tourmaline (dravite, schorl, fluor-elbaite, Mn-rich elbaite), cordierite-sekaninaite, garnet, rare element-bearing silicate minerals...
FIGURES | View All (26)
Journal Article
Published: 01 February 2013
American Mineralogist (2013) 98 (2-3): 485–492.
...Peter Bačík; Jan CemPírek; Pavel Uher; Milan Novák; Daniel Ozdín; Jan FiliP; Radek Škoda; Karel Breiter; Mariana Klementová; Rudolf ĎuĎa; Lee a. Groat Abstract Oxy-schorl (IMA 2011-011), ideally Na(Fe 2+ 2 Al)Al 6 Si 6 O1 8 (BO 3 ) 3 (OH) 3 O, a new mineral species of the tourmaline supergroup...
FIGURES
Journal Article
Published: 01 August 2012
European Journal of Mineralogy (2012) 24 (4): 695–715.
... data (optical and Mössbauer spectroscopies) were used to characterize coloured (brown, pink, green) tourmalines from three granitic pegmatites from the Moldanubian nappes (Königsalm, Maigen and Blocherleitengraben; Lower Austria). The tourmalines can be classified as fluor-schorl, schorl, foitite...
FIGURES | View All (8)