Gaudefroyite R050675



Name: Gaudefroyite
RRUFF ID: R050675
Ideal Chemistry: Ca4Mn3+3(BO3)3(CO3)O3
Locality: Wessels mine, Cape Province, South Africa
Source: University of Arizona Mineral Museum 14749 [view label]
Owner: RRUFF
Description: Black hexagonal stubby dipyramidal crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
CHEMISTRY 
RRUFF ID: R050675.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca4.00(Mn3+2.98   0.02)Σ=3(BO3)3(CO3)(O2.94(OH)0.06)Σ=3 ; B, C, H not measured but estimated by charge balance.
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R050675
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050675.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
Resolution:
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POWDER DIFFRACTION 
RRUFF ID: R050675.1
Sample Description: Powder
Cell Refinement Output: a: 10.6015(4)Å    b: 10.6015(4)Å    c: 5.8854(8)Å
alpha: 90.°    beta: 90.°    gamma: 120.°   Volume: 572.86(7)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.

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

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REFERENCES for Gaudefroyite

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]

Jouravsky G, Permingeat F (1964) La gaudefroyite, une nouvelle espèce minérale, Bulletin de la Société Française de Minéralogie et de Cristallographie, 87, 216-229   [view file]

Fleischer M (1965) New mineral names, American Mineralogist, 50, 805-813   [view file]

Hoffmann C, Armbruster T, Kunz M (1997) Structure refinement of (001) disordered gaudefroyite Ca4Mn33+[(BO3)3(CO3)O3]: Jahn-Teller-distortion in edge-sharing chains of Mn3+O6 octahedra, European Journal of Mineralogy, 9, 7-19

Hassan I, Duane M J (1999) The differential thermal analysis of gaudefroyite, The Canadian Mineralogist, 37, 1363-1368   [view file]

Antao S M, Hassan I (2008) Gaudefroyite, Ca8Mn3+6[(BO3)6(CO3)2O6]: high-temperature crystal structure, The Canadian Mineralogist, 46, 183-193   [view file]