Mineral - Veszelyite
Veszelyite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
(Cu,Zn)₂Zn(PO₄)₂ · 2H₂O
Unit Cell
a=9.83 b=10.22 c=7.53 β=103° Z=4
Physical Properties
Hardness
3.5 - 4
Streak
blue
Density
Normal (2-3,5)
Cleavage
Distinct after {001} and {110}
Fracture
Tenacity
Brittle
Optical Properties
Color
greenblue
Birefringence
0.055
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
P2 1 /c (14)
Habit
book-shaped, crusty, spherical, massive, prismatic, rosette, spear-shaped, tabular
Formation
Secondary in the oxidation zone of copper- and zinc-bearing deposits, primarily through the reaction of metal-bearing hydrothermal solutions with phosphate-bearing country rock or through the alteration of primary phosphates.
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Veszelyite
Composition
Elements
Mass
P₂O₅
18.43
FeO
0.06
NiO
0.01
CuO
37.82
ZnO
26.69
PbO
0.05
H₂O
16.87
Romania (Palache et al. 1952)