Kazakovite
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| Kazakovite | |
|---|---|
 | |
| General | |
| Category | Minerals |
| Formula | Na6Mn2+Ti(Si6O18) |
| IMA symbol | Kzk[1] |
| Strunz classification | 9.CJ.15a |
| Dana classification | 61.1.2a.2 |
| Crystal system | Trigonal |
| Crystal class | Hexagonal scalenohedral H-M symbol: (3 2/m) |
| Space group | R 3m |
| Unit cell | 1,168.92 |
| Identification | |
| Color | Pale yellow |
| Twinning | Simple, complex, and polysynthetic twins, axis normal to (1124) |
| Cleavage | None |
| Fracture | Irregular/uneven, conchoidal |
| Mohs scale hardness | 4 |
| Luster | Vitreous, greasy |
| Streak | White |
| Diaphaneity | Transparent |
| Specific gravity | 2.84 |
| Density | 2.84 |
| Optical properties | Uniaxial (−) |
| Refractive index | nω = 1.648 – 1.650 nε = 1.625 – 1.638 |
| Birefringence | 0.023 |
| Common impurities | Al, Fe, Nb, Mg, Ca, K, P, H2O |
| Other characteristics |  Radioactive |
Kazakovite was named in honor of Maria Efimovna Kazakova analytical chemist. It is a type locality of Karnasurt mountain, Lovozersky District, Murmansk Oblast, Russia.[2] It was approved by the IMA in 1974, the same year it was discovered.[3]