Mineral - Norbergite
Norbergite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Mg₃(SiO₄)(F,OH)₂
Unit Cell
Physical Properties
Hardness
6 - 6.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whitebrownredyellow
Birefringence
Luster
Vitreous,
Waxy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
blocky, granular, prismatic, tabular
Formation
Metasomatose
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Norbergite