Mineral - Pyrophyllite
Pyrophyllite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Al₂Si₄O₁₀(OH)₂
Unit Cell
Physical Properties
Hardness
1 - 2
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whitegrayyellowgreen
Birefringence
Luster
Greasy,
Pearly
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
acicular, radial
Formation
hydrothermal, Metamorphose
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Pyrophyllite