Tarbagataite R130041

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Record 11 of 11  

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.
Mineral Groups: [ astrophyllite (11) ] [ Astrophyllite (5) ]
CHEMISTRY 
RRUFF ID: R130041.2
Sample Description: Microprobe Fragment
Measured Chemistry: (K0.76Rb0.18Na0.12Cs0.040.90)Σ=2(Ca0.62Na0.38)Σ=1(Fe2+3.51Mn2.94Mg0.28Zr0.02Zn0.020.23)Σ=7(Ti1.57Nb0.30Sn0.11Zr0.02)Σ=2[(Si4.045Al0.015)Σ=8.12O12]2O2[(OH4.65F0.35]
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R130041
Sample Description: IR Sample
Instrument settings: Nicolet FTIR 740 spectrophotometer
Resolution:
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POWDER DIFFRACTION 
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
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Tarbagataite

American Mineralogist Crystal Structure Database Record: [view record]

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]

Sokolova E (2012) Further developments in the structure topology of the astrophyllite-group minerals, Mineralogical Magazine, 76, 863-882   [view file]

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]

Sokolova E, Cámara F, Hawthorne F C, Ciriotti M E (2017) The astrophyllite supergroup: nomenclature and classification, Mineralogical Magazine, 81, 143-153