Mineral - Evansite
Evansite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Al₃(PO₄)(OH)₆ · 6H₂O
Unit Cell
Physical Properties
Hardness
3.5 - 4
Streak
white
Density
Light (<2)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whiteyellowgreenbluecolorless
Birefringence
Luster
Vitreous,
Waxy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
amorphous
Point Group
Space Group
Habit
crusty, spherical, kidney-shaped, spherulitic, grape-shaped
Formation
Metamorphose, Verwitterung aus Guano (Sekundär)
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Evansite