Mineral - Kröhnkite
Kröhnkite
Chemical Properties
Mineral Class
Sulphates
Toxicity
none
Formula
Na₂Cu(SO₄)₂ · 2H₂O
Unit Cell
Physical Properties
Hardness
2.5 - 3
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
greenblue
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
coarse, fibrous, crusty, prismatic
Formation
Oxidationszone von Kupfer-Lagerstätten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Kröhnkite