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Unnamed (Bi Chromate Oxide)
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Formula:
Bi38Cr6+O60
Colour:
Brownish black
Lustre:
Metallic
Hardness:
4 - 4½
Specific Gravity:
14.08
Crystal System:
Isometric
Known as a synthetic compound.
Unique Identifiers
Mindat ID:
42215
Long-form identifier:
mindat:1:1:42215:6
Physical Properties of Unnamed (Bi Chromate Oxide)
Metallic
Transparency:
Opaque
Colour:
Brownish black
Hardness:
4 - 4½ on Mohs scale
Hardness:
VHN100=232.78 - Vickers
Hardness Data:
Measured
Density:
14.08(2) g/cm3 (Measured)
Optical Data of Unnamed (Bi Chromate Oxide)
Type:
Isotropic
RI values:
n = 3.14(3)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High
Chemistry of Unnamed (Bi Chromate Oxide)
Mindat Formula:
Bi38Cr6+O60
Element Weights:
Elements listed:
Crystallography of Unnamed (Bi Chromate Oxide)
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Im3m
Cell Parameters:
a = 1.0181(1) Å
Unit Cell V:
1055.29 ų
Morphology:
Irregular aggregates of minute cubes to 0.05 mm
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 0.321 Å | (100) |
| 0.272 Å | (72) |
| 0.171 Å | (40) |
| 0.169 Å | (30) |
| 0.165 Å | (30) |
| 0.160 Å | (30) |
| 0.294 Å | (25) |
| 0.359 Å | (22) |
| 0.217 Å | (20) |
| 0.150 Å | (20) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Unnamed (Bi Chromate Oxide)
mindat.org URL:
https://www.mindat.org/min-42215.html
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References for Unnamed (Bi Chromate Oxide)
Localities for Unnamed (Bi Chromate Oxide)
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China | |
| Xinchun Zhou et al. (2004) |
