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Minerals - Vermiculite | TerraCollect
Mineral - Vermiculite
Vermiculite
Mg₀,7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Mg₀,7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ · 8H₂O
Unit Cell
Physical Properties
Hardness
1.5 - 2
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
brown
gray
yellow
Birefringence
Luster
Greasy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Cleavage
Fracture
Tenacity
Point Group
Space Group
Habit
leafy,
massive
Formation
hydrothermal, Verwitterung (Z.B.von Biotit)
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Vermiculite
