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Minerals - Tennantite-(Zn) | TerraCollect
Mineral - Tennantite-(Zn)
Tennantite-(Zn)
Cuâ(CuâZnâ)AsâSââS
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
low
Formula
Cuâ(CuâZnâ)AsâSââS
Unit Cell
a=10.19 Z=2
Physical Properties
Hardness
3 - 4.5
Streak
black
gray
gray black
Optical Properties
Color
black
gray
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Composition
Elements
Mass
Cu
35.72
Ag
13.65
Zn
6.90
Pb
0.86
Fe
0.42
As
17.18
Sb
0.13
Density
Heavy (3,5-6)
Cleavage
Fracture
conchoidal
Tenacity
Brittle
hextetrahedral -
4
3m
Space Group
I
4
3m (217)
Habit
dodecahedron,
Octahedron,
pyramidal,
Tetrahedron,
Triacis octahedron,
Cube
Formation
Primary hydrothermal in polymetallic vein deposits or massive sulfide deposits through precipitation from moderately warm (mesothermal to epithermal), copper-rich solutions under reducing conditions.
Paragenesis
Twinning
Contact- and Penetration twins after {111}
Rarity
Rather rare
Synonyms
Tennantite-(Zn)
S
25.04
Colorado (Palache et al. 1952)
Groups and Members
Tetrahedrite-Group
Tennantite-Subgroup
