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Minerals - Pyrophyllite | TerraCollect
Mineral - Pyrophyllite
Pyrophyllite
Al₂Si₄O₁₀(OH)₂
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)
Optical Properties
Color
white
gray
yellow
green
Birefringence
Luster
Greasy,
Pearly
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
Cleavage
Fracture
Tenacity
triclinic
Point Group
Space Group
Habit
acicular,
radial
Formation
hydrothermal, Metamorphose
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Pyrophyllite
