Mineral - Brandtite
Brandtite
Chemical Properties
Mineral Class
Arsenates
Toxicity
middle
Formula
Ca₂Mn²⁺(AsO₄)₂ · 2H₂O
Unit Cell
Physical Properties
Hardness
3.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whitepinkcolorless
Birefringence
0.020
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
P2 1 /c (14)
Habit
spherical, acicular, prismatic, rosette, tabular
Formation
Metasomatose
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Brandtite
Groups and Members
Kröhnkite-Supergroup
Brandtite-Group