Bertrandite R060800



Name: Bertrandite
RRUFF ID: R060800
Ideal Chemistry: Be4Si2O7(OH)2
Locality: Golconda mine, Governador Valadares, Minas Gerais, Brazil
Source: Bob Jenkins [view label]
Owner: RRUFF
Description: Colorless pseudohexagonal prisms
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Quick search: [ All Bertrandite samples (2) ]
CHEMISTRY 
RRUFF ID: R060800.2
Sample Description: Microprobe Fragment
Measured Chemistry: Be4.00Si2.00O7(OH)2
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Sample is oriented and mounted on a pin
Pin ID: M00406
Orientation: Laser parallel to  b*  (0 1 0).     Fiducial mark perpendicular to laser is parallel to  c   [0 0 1].
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R060800
Wavelength:
Sample Description: Unoriented sample.
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R060800.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.726(4)Å    b: 15.01(1)Å    c: 4.532(3)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 595.6(1)Å3    Crystal System: orthorhombic
  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 Bertrandite

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]

Damour A A (1883) Note et analyse sur le nouveau miné des environs de Nantes, Bulletin de la Société Minéralogique de France, 6, 252-254   [view file]

Solov'eva L P, Belov N V (1965) Precise determination of the crystal structure of bertrandite Be4[Si2O7](OH)2, Soviet Physics - Crystallography, 9, 458-460   [view file]

Morgan W C, (1967) Genthelvite and bertrandite from the Cairngorm Mountains, Scotland, Mineralogical Magazine, 36, 60-63   [view file]

Hazen R M, Au A Y (1986) High-pressure crystal chemistry of phenakite (Be2SiO4) and bertrandite (Be4Si2O7(OH)2), Physics and Chemistry of Minerals, 13, 69-78

Hofmeister A M, Hoering T C, Virgo D (1987) Vibrational spectroscopy of of beryllium aluminosilicates: heat capacity calculations from band assignments, Physics and Chemistry of Minerals, 14, 205-224

Giuseppetti G, Tadini C, Mattioli V (1992) Bertrandite: Be4Si2O7(OH)2, from Val Vigezzo (NO) Italy: the X-ray structural refinement, Neues Jahrbuch für Mineralogie, Monatshefte, 1992, 13-19