镁铁闪石
Also known as cummingtonite, ferroan
Cummingtonite ( ) is a metamorphic amphibole with the chemical composition , magnesium iron silicate hydroxide.
Key facts
- Mineral.name
- Cummingtonite
- Mineral.category
- Inosilicate
- Mineral.image
- Amphibole - Cummingtonite w- chlorite in schist Magnesium iron silicate 3800 foot level Homestake Mine Lawrence COunty South Dakota 2071.jpg
- Mineral.IMAsymbol
- Cum
- Mineral.strunz
- 9.DE.05
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) H-M symbol: (2/m)
- Mineral.symmetry
- Monoclinic Space group: C2/m
- Mineral.unit cell
- a = 9.53 Å, b = 18.23 Å, c = 5.32 Å; β = 101.97°; Z = 2
- Mineral.color
- Dark green, brown, gray, beige; colorless to pale green in thin section
- Mineral.habit
- Rarely as distinct crystals. Columnar to fibrous and granular