Mineral - Sulphohalite
Sulphohalite
Chemical Properties
Mineral Class
Sulphates
Toxicity
none
Formula
Na₆(SO₄)₂FCl
Unit Cell
a=10,07 Z=4
Physical Properties
Hardness
3.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
conchoidal
Tenacity
Optical Properties
Color
whitegrayorangeyellowcolorless
Birefringence
Luster
Vitreous,
Greasy
Transparency
transparent
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Space Group
Habit
coarse, dodecahedron, massive, Octahedron, Cube
Formation
Sedimentär, als Evaporit
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Sulphohalite
Composition
Elements
Mass
SO₃
41,79
Na₂O
43,97
K₂O
0,10
F
4,71
Cl
9,10
Kalifornien
Groups and Members
Perowskit-Supergruppe
Stöchiometrische Perowskit-Gruppe
Sulfohalit-Subgruppe
Name and first discovery : The name derives from its composition, which includes sulfate and the Greek word "hals" for salt, alluding to its halogen content. It was originally described by Hidden and MacKintosh (1888) from Searles Lake, California, USA.
Chemistry :
Synonyms :
Varieties :