Mineral - Talmessite
Talmessite
Chemical Properties
Mineral Class
Arsenates
Toxicity
middle
Formula
Ca₂Mg(AsO₄)₂ · 2H₂O
Unit Cell
Physical Properties
Hardness
5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
redpinkcolorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
crusty, spherical, acicular
Formation
Oxidationszone von Arsen-Lagertsätten (Z.B. Aus Realgar)
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Talmessite