Mineral - Lasalite
Lasalite
Chemical Properties
Mineral Class
Vanadates
Toxicity
none
Formula
Na₂Mg₂(V₁₀O₂₈) · 20H₂O
Unit Cell
a=23,90 b=11,00 c=17,10 β=118° Z=2
Physical Properties
Hardness
1
Streak
Density
Normal (2-3,5)
Cleavage
Fracture
nd
Tenacity
Brittle
Optical Properties
Color
orangeyellowyellow orange
Birefringence
0,037
Luster
Adamantine
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
blocky, crusty, massive, Rhombohedron
Formation
Oxidationszone von Uran-Vanadium-Lagerstätten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Lasalite
Composition
Elements
Mass
Na₂O
4,06
MgO
5,42
CaO
1,75
K₂O
0,47
V₂O₅
61,87
SO₃
2,55
H₂O
2,88
Utah
Groups and Members
Pascoit-Gruppe