Классификация
- Crystal systems:
- tetragonal
- Space groups:
- I4, mmm, P42, n
- Structural group:
- Not in a structural group
- IMA status:
- Approved, Grandfathered
Происхождение
- Country:
- Sweden
- Published:
- 1937
- Oldest age Ma:
- 1000
- Paragenetic modes:
- Abiotic, Primary, Secondary, Stage 4a: Earth's earliest continental crust, PM23 - Subaerial alteration, PM31 - Contact metamorphism, Stage 4b: Highly evolved igneous rocks, PM35 - Ultra-alkali and agpaitic igneous rocks