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Franciscanite R060056

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Name: Franciscanite
RRUFF ID: R060056
Ideal Chemistry: Mn2+6(V5+◻)(SiO4)2O3(OH)3
Locality: Pennsylvania mine, Santa Clara County, California, USA
Source: Marcus Origlieri [view label]
Owner: RRUFF
Description: Black to deep red granular massive
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Welinite (1) ]
CHEMISTRY 
RRUFF ID: R060056.2
Sample Description: Microprobe Fragment
Measured Chemistry: Mn2+6.00(V5+0.86Fe3+0.10Ti0.04)Σ=1(Si1.00O4)2((OH)3.24O2.76)6
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R060056
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R060056.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.135(2)Å    b: 8.135(2)Å    c: 4.793(1)Å
alpha: 90°    beta: 90°    gamma: 120°   Volume: 274.7(1)Å3    Crystal System: hexagonal
  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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DIF File
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REFERENCES for Franciscanite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Dunn P J, Peacor D R, Erd R C, Ramik R A (1986) Franciscanite and örebroite, two new minerals from California and Sweden, related to redefined welinite, American Mineralogist, 71, 1522-1526   [view file]

Pertlik F (1986) The crystal structure of franciscanite, Mn3(Vx◻1-x)(SiO4)(O,OH)3, [x ~ 0.5], Neues Jahrbuch für Mineralogie, Monatshefte, 1986, 493-499