Mineral - Langbeinite
Langbeinite
Chemical Properties
Mineral Class
Sulphates
Toxicity
none
Formula
K₂Mg₂(SO₄)₃
Unit Cell
a=9,92 Z=4
Physical Properties
Hardness
3.5 - 4
Streak
white
Density
Normal (2-3,5)
Cleavage
nd
Fracture
conchoidal
Tenacity
Brittle
Optical Properties
Color
whiteredorangepinkcolorless
Birefringence
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Space Group
Habit
coarse, granular, massive, Octahedron, Cube
Formation
Sedimentär, Evaporit, in Klai-Lagerstätten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Langbeinite
Composition
Elements
Mass
SO₃
58,00
MgO
19,91
K₂O
22,71
Österreich
Groups and Members
Langbeinit-Gruppe