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
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Raman Data (Processed)
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Raman Data (RAW) View Graph
RRUFF File
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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Infrared Data (Processed)
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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.

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

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

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Cell Refinement Data
Cell Refinement Output Data
DIF File
X-ray Data (XY - Processed)
RRUFF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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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]