Mineral - Lead
Lead
Chemical Properties
Mineral Class
Elements
Toxicity
middle
Formula
Pb
Unit Cell
a=4.94 Z=4
Physical Properties
Hardness
1.5
Streak
gray
Density
Very Heavy (>6)
Cleavage
Fracture
hooked
Tenacity
Elastic-flexible
Optical Properties
Color
gray
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
hexoctahedral - 4/m 3 2/m
Space Group
Fm 3 m (225)
Habit
dodecahedron, Octahedron, Cube
Formation
In hydrothermalen ore deposits
Paragenesis
Twinning
After {111}
Rarity
Rather rare
Synonyms
Lead, Aabam, Native Lead
Groups and Members
Nickel-Group