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Name: Tarbagataite RRUFF ID: R130041 Ideal Chemistry: (K◻)CaFe2+7Ti2(Si4O12)2O2(OH)5 Locality: Verkhnee Espe deposit, Akjailyautas Mountains, Kazakhstan Source: Elena Sokolova Owner: Elena Sokolova Description: Flakes brown or pale golden brown, with a colorless to very pale yellow streak and a vitreous to pearly lustre. Associated with astrophyllite, zinc pyrophanite, columbite-(Mn) and quartz. Data from Stepanov et al (2012) Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis. |
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Mineral Groups: [ astrophyllite (11) ] [ Astrophyllite (5) ] |
CHEMISTRY | ||||||||
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INFRARED SPECTRUM (Attenuated Total Reflectance) | |||||||||||||||
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POWDER DIFFRACTION | |||||||
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RRUFF ID: | R130041.9 | ||||||
Sample Description: | Single crystal, powder profile is calculated | ||||||
Cell Refinement Output: |
a: 5.3863(3)Å b: 11.9141(6)Å c: 11.7171(6)Å alpha: 112.978(2)° beta: 94.641(2)° gamma: 103.189(2)° Volume: 661.84(9)Å3 Crystal System: triclinic |
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REFERENCES for Tarbagataite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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Williams P A, Hatert F, Pasero M, Mills S J (2011) IMA Commission on new minerals, nomenclature and classification (CNMNC) Newsletter 7. New minerals and nomenclature modifications approved in 2010, Mineralogical Magazine, 75, 27-31 [view file] |
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Sokolova E (2012) Further developments in the structure topology of the astrophyllite-group minerals, Mineralogical Magazine, 76, 863-882 [view file] |
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Stepanov A V, Bekenova G K, Levin V L, Sokolova E, Hawthorne F C, Dobrovol'skaya E A (2012) Tarbagataite, (K,◻)2(Ca,Na)(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)4(OH,F), a new astrophyllite-group mineral species from the Verkhnee Espe Deposit, Akjailyautas Mountains, Kazakhstan: Description and crystal structure, The Canadian Mineralogist, 50, 159-168 [view file] |
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Sokolova E, Cámara F, Hawthorne F C, Ciriotti M E (2017) The astrophyllite supergroup: nomenclature and classification, Mineralogical Magazine, 81, 143-153 |
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