Mineral - Olivenite
Olivenite
Chemical Properties
Mineral Class
Arsenates
Toxicity
middle
Formula
Cu₂[OH|AsO₄]
Unit Cell
a=8.59 b=8.21 c=5.93 β=90° Z=4
Physical Properties
Hardness
3
Streak
white
Density
Heavy (3,5-6)
Cleavage
Indistinct after {101} and {110}
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
whitebrowngreen
Birefringence
0.085
Luster
Vitreous,
Adamantine,
Pearly
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
P2 1 /m (11)
Habit
tufty, acicular, prismatic, radial, tabular
Formation
As a secondary mineral formed by the oxidation of arsenic-bearing copper sulfides or arsenides in the oxidation zone of ore deposits
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Olivenite
Composition
Elements
Mass
As₂O₅
39.80
CuO
56.65
H₂O
3.55
England (Palache et al. 1952)
Groups and Members
Olivenite-Group