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Minerals - Chalcophanite | TerraCollect
Mineral - Chalcophanite
Chalcophanite
ZnMn⁴⁺₃O₇ · 3H₂O
Chemical Properties
Mineral Class
Oxides and Hydrxides
Toxicity
none
Formula
ZnMn⁴⁺₃O₇ · 3H₂O
Unit Cell
Physical Properties
Hardness
2.5
Streak
brown
Density
Heavy (3,5-6)
Optical Properties
Color
black
brown
Birefringence
0.000
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
trigonal
Point Group
Groups and Members
Chalcophanite-Group
Cleavage
Fracture
uneven
Tenacity
Brittle
rhombohedral -
3
Space Group
R
3
(148)
Habit
kidney-shaped,
stalactitic,
tabular
Formation
In the oxidation zone of manganese and zinc deposits
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Chalcophanite
