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Minerals - Gilmarite | TerraCollect
Mineral - Gilmarite
Gilmarite
Cu₃(AsO₄)(OH)₃
Chemical Properties
Mineral Class
Arsenates
Toxicity
low
Formula
Cu₃(AsO₄)(OH)₃
Unit Cell
a=5,45 b=5,87 c=5,10 α=115° β=93° γ=92° Z=1
Physical Properties
Hardness
3
Streak
green
blue
blue green
Optical Properties
Color
green
blue
blue green
Birefringence
0,070
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Composition
Elements
Mass
Asâ‚‚Oâ‚…
30,20
CuO
62,70
Hâ‚‚O
7,10
Frankreich
Groups and Members
Gilmarit-Gruppe
Density
Cleavage
Gut auf (010)
Fracture
uneven
Tenacity
Brittle
Point Group
Space Group
Habit
leafy,
spherical,
acicular,
rosette,
radial,
tabular
Formation
Oxidationszone von Kupfer-Lagerstätten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Gilmarite
