Fluorcalciomicrolite R050625

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Record 1 of 9  

Name: Fluorcalciomicrolite
RRUFF ID: R050625
Ideal Chemistry: (Ca,Na,◻)2Ta2O6F
Locality: Urubu mine, Itinga, Minas Gerais, Brazil
Source: Gemological Center
Owner: RRUFF
Description: Yellow fragment
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Groups: [ pyrochlore (28) ] [ microlite (15) ]
Quick search: [ All Fluorcalciomicrolite samples (9) ]
RRUFF ID: R050625.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Ca0.98Na0.92)∑=1.90(Ta1.88Nb0.11Sn0.01)∑=2O6[F0.86(OH)0.01]∑=0.87
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample

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RRUFF ID: R050625
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050625.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
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RRUFF ID: R050625.1
Sample Description: Powder
Cell Refinement Output: a: 10.42178(8)Å    b: 10.42178(8)Å    c: 10.42178(8)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 1131.94(3)Å3    Crystal System: cubic
  File Type Information Close
Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Fluorcalciomicrolite

American Mineralogist Crystal Structure Database Record: [view record]

Williams P A, Hatert F, Pasero M, Mills S J (2012) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 14, New minerals and nomenclature modifications approved in 2012, Mineralogical Magazine, 76, 1281-1288   [view file]

Andrade M B, Atencio D, Persiano A I C, Ellena J (2013) Fluorcalciomicrolite, (Ca,Na,◻)2Ta2O6F, a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil, Mineralogical Magazine, 77, 2989-2996   [view file]

Belakovskiy D I, Cámara F, Gagne O C, Uvarova Y (2015) New mineral names, American Mineralogist, 100, 2352-2362   [view file]

Grew E S, Bosi F, Ros L, Kristiansson P, Gunter M E (2018) Fluor-elbaite, lepidolite and Ta-Nb oxides from a pegmatite of the 3000 Ma Sinceni Pluton, Swaziland: evidence for lithium-cesium-tantalum (LCT) pegmatites in the Mesoarchean, European Journal of Mineralogy, 30, 205-218