Mineral - Weberite
Weberite
Chemical Properties
Mineral Class
Halides
Toxicity
none
Formula
Na₂Mg[AlF₆]F
Unit Cell
a=7,06 b=10,00 c=7,30 Z=4
Physical Properties
Hardness
3.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Wenig auf (001) und undeutlich auf (O10)
Fracture
uneven
Tenacity
nd
Optical Properties
Color
whitegrayorangecolorless
Birefringence
0.004
Luster
Vitreous
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
coarse, granular, massive
Formation
Magmatisch, Pegmatit
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Weberite
Composition
Elements
Mass
Na₂O
19,08
K₂O
1,19
Fe₂O₃
0,37
MgO
10,43
CaO
0,08
Al₂O₃
11,65
F
57,58
Grönland