Mineral - Rasvumite
Rasvumite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
KFe₂S₃
Unit Cell
a=9,05 b=11,02 c=5,43 Z=4
Physical Properties
Hardness
4 - 5
Streak
Density
Normal (2-3,5)
Cleavage
Vollkommen auf (110)
Fracture
Tenacity
Optical Properties
Color
browngrayredorangesilver
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
lath-shaped, acicular, prismatic, prismatic, tabular
Formation
Sekundär aus Pyrrhotin, in magmatischen, alkalischen Gesteinen
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Rasvumite
Composition
Elements
Mass
K
16,30
Fe
45,20
S
38,00
Russland