Mineral - Betekhtinite
Betekhtinite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
middle
Formula
(Cu,Fe)₂₁Pb₂S₁₅
Unit Cell
Physical Properties
Hardness
3 - 3.5
Streak
black
Density
Very Heavy (>6)
Cleavage
Fracture
Tenacity
Optical Properties
Color
black
Birefringence
Luster
Metallic
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Immm (71)
Habit
acicular
Formation
hydrothermal
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Betekhtinite