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Stracherite, BaCa (sub 6) (SiO (sub 4) ) (sub 2) [(PO (sub 4) )(CO (sub 3) )]F, the first CO (sub 3) -bearing intercalated hexagonal antiperovskite from Negev Desert, Israel

Evgeny V. Galuskin, Biljana Krueger, Irina O. Galuskina, Hannes Krueger, Yevgeny Vapnik, Anuschka Pauluhn and Vincent Olieric
Stracherite, BaCa (sub 6) (SiO (sub 4) ) (sub 2) [(PO (sub 4) )(CO (sub 3) )]F, the first CO (sub 3) -bearing intercalated hexagonal antiperovskite from Negev Desert, Israel
American Mineralogist (October 2018) 103 (10): 1699-1706

Abstract

The new mineral stracherite, BaCa (sub 6) (SiO (sub 4) ) (sub 2) [(PO (sub 4) )(CO (sub 3) )]F [R3m, a = 7.0877(5) Aa, c = 25.201(2) Aa, V = 1096.4(1) Aa (super 3) , Z = 3], belongs to the zadovite group, which also includes zadovite, BaCa (sub 6) [(SiO (sub 4) ) (PO (sub 4) )](PO (sub 4) ) (sub 2) F; aradite, BaCa (sub 6) [(SiO (sub 4) )(VO (sub 4) )](VO (sub 4) ) (sub 2) F; and gazeevite, BaCa (sub 6) (SiO (sub 4) ) (sub 2) (SO (sub 4) ) (sub 2) O. All minerals of this group exhibit single-layer antiperovskite modules, which are intercalated with tetrahedral layers. In stracherite, the first CO (sub 3) -bearing intercalated hexagonal antiperovskite, about 38% of the (PO (sub 4) ) (super 3-) tetrahedra are randomly substituted by planar (CO (sub 3) ) (super 2-) groups. The mineral was discovered in spurrite rocks of the Hatrurim Complex in the Negev Desert near Arad, Israel. Associated minerals are spurrite, calcite, brownmillerite, shulamitite, CO (sub 3) -bearing fluorapatite, fluormayenite-fluorkyuygenite, and ariegilatite. The empirical formula of stracherite is: (Ba (sub 0.96) K (sub 0.02) Na (sub 0.01) ) (sub Sigma 0.99) Ca (sub 6.01) [(SiO (sub 4) ) (sub 1.86) (PO (sub 4) ) (sub 0.12) (AlO (sub 4) ) (sub 0.01) (TiO (sub 4) ) (sub 0.01) ] (sub Sigma 2) [(PO (sub 4) ) (sub 1.05) (CO (sub 3) ) (sub 0.75) (SO (sub 4) ) (sub 0.18) (V O (sub 4) ) (sub 0.02) ] (sub Sigma 2) (F (sub 0.95) O (sub 0.03) ) (sub Sigma 0.98) . Poikilitic crystals of stracherite are up to 0.5 mm in size and are confined to re-crystallization zones of spurrite marbles under the influence of by-products (gases, fluids) of combustion metamorphism.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 103
Serial Issue: 10
Title: Stracherite, BaCa (sub 6) (SiO (sub 4) ) (sub 2) [(PO (sub 4) )(CO (sub 3) )]F, the first CO (sub 3) -bearing intercalated hexagonal antiperovskite from Negev Desert, Israel
Affiliation: University of Silesia, Department of Geochemistry, Mineralogy and Petrography, Sosnowiec, Poland
Pages: 1699-1706
Published: 201810
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 28
Accession Number: 2019-007183
Categories: General mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N31°13'58" - N31°13'58", E35°16'02" - E35°16'02"
Secondary Affiliation: University of Innsbruck, AUT, AustriaBen-Gurion University of the Negev, ISR, IsraelPaul Scherrer Institute, CHE, Switzerland
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201906
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