Mineral - Boleite
Boleite
Chemical Properties
Mineral Class
Halides
Toxicity
none
Formula
KPb₂₆Cu₂₄Ag₉(OH)₄₈Cl₆₂
Unit Cell
a=15.29 Z=1
Physical Properties
Hardness
3 - 3.5
Streak
blue
Density
Heavy (3,5-6)
Cleavage
Perfect after {001}
Fracture
Tenacity
Brittle
Optical Properties
Color
blue
Birefringence
Luster
Vitreous,
Pearly
Transparency
translucent
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
hexoctahedral - 4/m 3 2/m
Space Group
Pm 3 m (221)
Habit
Cube
Formation
Oxidation zone of copper deposits
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Boleite, Argentopercylite
Composition
Elements
Mass
Ag
12.03
Pb
49.16
CuO
17.17
Cl
17.04
H₂O
4.35
Mexico (Palache et al. 1952)