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Minerals - Sillimanite | TerraCollect
Mineral - Sillimanite
Sillimanite
Alâ‚‚[O|SiOâ‚„]
Chemical Properties
Mineral Class
Silicates
Toxicity
Formula
Alâ‚‚[O|SiOâ‚„]
Unit Cell
Physical Properties
Hardness
6.5 - 7.5
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
brown
yellow
green
colorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Cleavage
Fracture
Tenacity
Point Group
Space Group
Habit
fibrous,
prismatic
Formation
Metamorphose, Magmatisch
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Sillimanite
