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Minerals - Galena | TerraCollect
Mineral - Galena
Galena
PbS
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Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
middle
Formula
PbS
Unit Cell
a=5.93 Z=4
Physical Properties
Hardness
2.5
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
Pb
86.50
Cu
0.07
S
13.31
England (Palache et al. 1952)
Groups and Members
Galena-Group
Karten-Ebenen
Geologische Karte
Satelliten Karte
Density
Very Heavy (>6)
Cleavage
Perfect after {100}
Fracture
conchoidal
Tenacity
Brittle
hexoctahedral - 4/m
3
2/m
Space Group
Fm
3
m (225)
Habit
dendritic,
coarse,
Octahedron,
Cube
Formation
In hydrothermal ore deposits
Paragenesis
Twinning
Contact twins and penetration twins after {111}, often referred to as pseudohexagonal contact twins after the spinel law
Rarity
Common
Synonyms
Galena,
Bleiglanz
