Mineral - Cubanite
Cubanite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
CuFe₂S₃
Unit Cell
a=6.47 b=11.12 c=6.23 Z=4
Physical Properties
Hardness
3.5
Streak
black
Density
Heavy (3,5-6)
Cleavage
Fracture
conchoidal
Tenacity
Brittle
Optical Properties
Color
gold
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Pnma (62)
Habit
flower-shaped, prismatic, star-shaped
Formation
hydrothermal
Paragenesis
Twinning
Pseudohexagonal rotational twins after {110}
Rarity
Rarely
Synonyms
Cubanite
Composition
Elements
Mass
Cu
24.32
Fe
41.15
S
34.37
Cuba (Palache et al. 1952)