Классификация
- Crystal systems:
- hexagonal, orthorhombic, triclinic
- Space groups:
- C1, P31m
- Structural group:
- Alstonite
- IMA status:
- Approved, Grandfathered
Происхождение
- Country:
- United Kingdom
- Published:
- 1841
- Oldest age Ma:
- 2070
- Paragenetic modes:
- Abiotic, Primary, Secondary, Stage 4a: Earth's earliest continental crust, PM23 - Subaerial alteration, PM32 - Ba-Mn-Pb-Zn metamorphics, Stage 4b: Highly evolved igneous rocks, PM36 - Carbonatites & kimberlites