Mineral - Johannsenite
Johannsenite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
CaMn²⁺Si₂O₆
Unit Cell
Physical Properties
Hardness
6
Streak
green
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
browngraygreen
Birefringence
Luster
Vitreous,
Greasy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
prismatic, radial
Formation
Metasomatose
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Johannsenite