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Minerals - Bradaczekite | TerraCollect
Mineral - Bradaczekite
Bradaczekite
NaCu₄(AsO₄)₃
Chemical Properties
Mineral Class
Arsenates
Toxicity
none
Formula
NaCu₄(AsO₄)₃
Unit Cell
Physical Properties
Hardness
3.5
Streak
white
blue white
Density
Heavy (3,5-6)
Optical Properties
Color
blue
Birefringence
0.200
Luster
Vitreous,
Adamantine
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Groups and Members
Alluaudite-Supergroup
Alluaudite-Group
Cleavage
Fracture
Tenacity
monoclinic-prismatic - 2/m
Space Group
C2/c (15)
Habit
crusty,
prismatic,
Rhombohedron,
tabular
Formation
Paragenesis
Twinning
Rarity
Rare
Synonyms
Bradaczekite
