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Minerals - Malachite | TerraCollect
Mineral - Malachite
Malachite
Cu₂[(OH)₂|CO₃]
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Chemical Properties
Mineral Class
Carbonates
Toxicity
low
Formula
Cu₂[(OH)₂|CO₃]
Unit Cell
a=9.50 b=11.97 c=3.24 β=98° Z=4
Physical Properties
Hardness
3.5 - 4
Streak
green
Density
Heavy (3,5-6)
Optical Properties
Color
green
Birefringence
0.254
Luster
Vitreous,
Silky
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Composition
Elements
Mass
COâ‚‚
20.04
CuO
72.03
Hâ‚‚O
8.09
Italy (Palache et al. 1952)
Groups and Members
Malachite-Rosasite-Group
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Perfect after {
2
01}
Fracture
splintery
Tenacity
Brittle
monoclinic-prismatic - 2/m
Space Group
P2
1
/c (14)
Habit
tufty,
coarse,
felted,
massive,
acicular,
kidney-shaped,
prismatic,
pyramidal,
radial,
radial,
grape-shaped
Formation
Secondary, through the aqueous oxidation of copper-bearing sulfides in the oxidation zone of supergene ore deposits in the presence of carbonate-bearing solutions or rocks.
Paragenesis
Twinning
Arrow-like contact twins after {100}
Rarity
Common
Synonyms
Malachite
