Mineral - Prismatine
Prismatine
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(Fe,Mg)(Mg,Al,Fe)₅Al₄Si₂(Si,Al)₂(B,Si,Al)(O,OH,F)₂₂
Unit Cell
Physical Properties
Hardness
6.5 - 7
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
graygreen
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
prismatic
Formation
Metamorphose
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Prismatine