Mineral - Ussingite
Ussingite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Na₂AlSi₃O₈OH
Unit Cell
Physical Properties
Hardness
6 - 7
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
violet
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
coarse, granular, massive
Formation
Sekundär in Pegmatiten
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Ussingite