Mineral - Chalcopyrite
Chalcopyrite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
CuFeS₂
Unit Cell
a=5.28 c=10.40 Z=4
Physical Properties
Hardness
3.5 - 4
Streak
blackgreengreen black
Density
Heavy (3,5-6)
Cleavage
Indistinct after {011}
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
gray
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
tetragonal
Point Group
tetragonal-scalenohedral - 4 2m
Space Group
I 4 2b (122)
Habit
massive, Tetrahedron, grape-shaped
Formation
In orthomagmatic ore deposits, in hydrothermal vein ore deposits, in VHMS/SEDEX deposits
Paragenesis
Twinning
Contact twins after {112}
Rarity
Very common
Synonyms
Chalcopyrite
Composition
Elements
Mass
Cu
35.03
Fe
31.00
S
34.96
Canada (Palache et al. 1952)
Groups and Members
Chalcopyrite-Group