Mineral - Kruťaite
Kruťaite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
CuSe₂
Unit Cell
a=6,10 Z=4
Physical Properties
Hardness
4
Streak
blackgraygray black
Density
Very Heavy (>6)
Cleavage
Fracture
Tenacity
Optical Properties
Color
blackgraysilver
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Space Group
Habit
coarse, massive, Octahedron, Tetrahedron
Formation
hydrothermal
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Kruťaite
Composition
Elements
Mass
Cu
17,9
Co
2,2
Ni
8,9
Fe
0,1
Hg
0,1
Se
71,6
Bolivien
Groups and Members
Pyrit-Gruppe