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Dzhuluite, Ca (sub 3) SbSnFe (super 3+) (sub 3) O (sub 12) , a new bitikleite-group garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia

Irina O. Galuskina, Evgeny V. Galuskin, Joachim Kusz, Piotr Dzierzanowski, Krystian Prusik, Viktor M. Gazeev, Nikolai N. Pertsev and Leonid Dubrovinsky
Dzhuluite, Ca (sub 3) SbSnFe (super 3+) (sub 3) O (sub 12) , a new bitikleite-group garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia
European Journal of Mineralogy (February 2013) 25 (2): 231-239

Abstract

Dzhuluite, Ca (sub 3) SbSnFe (super 3+) (sub 3) O (sub 12) (Ia3d, a = 12.536(3) Aa, V = 1970.05(9) Aa (super 3) , Z = 8), a new antimony garnet of the bitikleite-group, was discovered in a kumtyubeite zone in close proximity to the contact with unaltered ignimbrite in a skarn xenolith from the Upper Chegem Caldera, Northern Caucasus, Russia. The empirical formula of the holotype dzhuluite is (Ca (sub 2.954) Fe (super 2+) (sub 0.043) Mg (sub 0.003) ) (sub Sigma 3.000) (Sn (sub 0.850) Sb (super 5+) (sub 0.764) Zr (sub 0.121) U (super 6+) (sub 0.127) Ti (super 4+) (sub 0.070) Sc (sub 0. 009) Nb (super 5+) (sub 0.058) Hf (sub 0.001) ) (sub Sigma 2.001) (Fe (super 3+) (sub 2.051) Al (sub 0.653) Fe (super 2+) (sub 0.182) Ti (super 4+) (sub 0.087) Si (sub 0.028) ) (sub Sigma 3.001) O (sub 12) . Associated minerals are kumtyubeite, cuspidine, fluorchegemite, larnite, fluorite, wadalite, rondorfite, hydroxylellestadite, perovskite, lakargiite, kerimasite, elbrusite, srebrodolskite, bultfonteinite, ettringite group minerals, hillebrandite, afwillite, tobermorite-like minerals, hydrocalumite and hydrogrossular. Dzhuluite forms poikilitic crystals <50 mu m in size that are light-yellow to dark-brown and with a creamy streak. The lustre is strongly vitreous. The calculated density of dzhuluite ranges from 4.708 to 4.750 g/cm (super 3) . Raman spectra are analogous to those of kimzeyite, kerimasite and other bitikleite-group minerals. Dzhuluite formed at high temperature during a retrograde stage of primary rock alteration in the larnite subfacies (sanidinite facies) as a result of fluorine metasomatism.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 25
Serial Issue: 2
Title: Dzhuluite, Ca (sub 3) SbSnFe (super 3+) (sub 3) O (sub 12) , a new bitikleite-group garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia
Affiliation: University of Silesia, Department of Geochemistry, Mineralogy and Petrography, Sosnowiec, Poland
Pages: 231-239
Published: 201302
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
References: 22
Accession Number: 2013-046201
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N43°16'60" - N43°16'60", E43°06'00" - E43°06'00"
Secondary Affiliation: Warsaw University, POL, PolandRussian Academy of Sciences, Institute of Geology of Ore Deposits, Geochemistry, Mineralogy and Petrography, RUS, Russian FederationUniversitaet Bayreuth, DEU, Germany
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201329
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