Aksaite
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
Aksaite (Mg[B6O7(OH)6]·2H2O) is a mineral found in Kazakhstan.
| Aksaite | |
|---|---|
Pale grey crystals of aksaite | |
| General | |
| Category | Nesoborates |
| Formula (repeating unit) | Mg[B6O7(OH)6]·2H2O |
| IMA symbol | Aks[1] |
| Strunz classification | 6.FA.05 |
| Dana classification | 26.6.4.1 |
| Crystal system | Orthorhombic Dipyramidal class |
| Space group | Orthorhombic H-M symbol: (2/m 2/m 2/m) Space group: Pbca |
| Identification | |
| Color | Colorless, white to pale grey |
| Cleavage | Distinct/Good; Probable on {100} and {010} |
| Mohs scale hardness | 2.5 |
| Streak | White |
| Diaphaneity | Transparent to translucent |
| Optical properties | Biaxial (−) |
| Birefringence | δ = 0.055 |
| 2V angle | Measured = 88°; Calculated = 78° |
| Dispersion | None |
| References | [2][3] |
Aksaite is named after the place it was discovered, Ak-say (lit. White Glen). It was found in 1963 in Chelkar Salt Dome, Ak-say Valley, Kazakhstan.
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