Mineral - Shattuckite
Shattuckite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Cu₅[OH|Si₂O₆]₂
Unit Cell
a=9.89 b=19.83 c=5.38 Z=4
Physical Properties
Hardness
3.5
Streak
blue
Density
Heavy (3,5-6)
Cleavage
Perfect after {010} and {100}
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
blue
Birefringence
0.062
Luster
Silky
Transparency
translucent,
opaque
Pleochroism
Blautöne
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Pbca (61)
Habit
fibrous, spherical, massive, acicular, radial, grape-shaped
Formation
Secondary, as a typical oxidation product in the oxidation zone of copper deposits resulting from the reaction of silicate-rich solutions with primary copper sulfides or their secondary minerals, such as malachite or chrysocolla
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Shattuckite
Composition
Elements
Mass
SiO₂
36.68
FeO
0.19
MnO
0.03
CuO
60.41
MgO
0.02
CaO
0.01
H₂O
2.66
Arizona (Ford 1915)