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Minerals - Chrysocolla | TerraCollect
Mineral - Chrysocolla
Chrysocolla
(Cu,Al)₂H₂Si₂O₅(OH)₄ · nH₂O
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(Cu,Al)₂H₂Si₂O₅(OH)₄ · nH₂O
Unit Cell
a=5.72 b=17.70 c=8.00
Physical Properties
Hardness
2 - 4
Streak
white
green
green white
Optical Properties
Color
green
blue
turquoise
Birefringence
Luster
Vitreous,
Greasy
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Composition
Elements
Mass
SiOâ‚‚
35.80
Al₂O₃
2.00
Fe₂O₃
0.01
CuO
42.00
MgO
0.08
CaO
1.04
Naâ‚‚O
0.04
Karten-Ebenen
Geologische Karte
Satelliten Karte
Density
Light (<2)
Cleavage
Fracture
conchoidal,
uneven
Tenacity
Brittle
,
amorphous
Point Group
Space Group
Habit
massive,
kidney-shaped,
stalactitic,
grape-shaped
Formation
In the oxidation zone of copper deposits, due to interaction with silicate solutions
Paragenesis
Twinning
Rarity
Common
Synonyms
Chrysocolla
Kâ‚‚O
0.05
Hâ‚‚O
19.46
Russia (Dana 1895)
