Mineral - Riebeckite
Riebeckite
Chemical Properties
Mineral Class
Silicates
Toxicity
Formula
Na₂Fe²⁺₃Fe³⁺₂[(OH)₂|Si₈O₂₂]
Unit Cell
Physical Properties
Hardness
5 - 6
Streak
grayblueblue grey
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
blackgrayblue
Birefringence
Luster
Vitreous,
Silky
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
fibrous, acicular, prismatic
Formation
Metamorphose, Magmatisch
Paragenesis
Twinning
Rarity
Common
Synonyms
Riebeckite