Vladimirite
| Vladimirite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | Ca5 [(HAsO4)2 |
| Crystal system | monoclinic |
| Space group | monoclinic |
| Unit cell | V 1,332.98 ų |
| Identification | |
| Formula mass | 848.16 gm |
| Color | pale rose, colorless, white |
| Crystal habit | radial |
| Twinning | penetration |
| Cleavage | good |
| Fracture | fibrous |
| Tenacity | brittle |
| Mohs scale hardness | 3.5 |
| Luster | vitreous(glassy) |
| Streak | white |
| Diaphaneity | transparent |
| Specific gravity | 3.17gm/cc |
| Density | 3.14gm |
| Optical properties | biaxial |
| Refractive index | 1.65-1.66 |
| Birefringence | δ = 0.011 |
| Pleochroism | trichroic |
| References | [1] [4] |
Vladimirite has a general chemical formula of Ca5 [(HAsO4)2|(AsO4)2]·5H2O. It was given this name after the Vladimirovskoye deposit in Russia, where it was discovered in the 1950's.[5]
References
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