Mineral - Lovdarite
Lovdarite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
K₂Na₆Be₄Si₁₄O₃₆ · 9H₂O
Unit Cell
a=39,58 b=6,93 c=7,15 Z=4
Physical Properties
Hardness
5 - 6
Streak
white
Density
Normal (2-3,5)
Cleavage
Deutlich auf (100), (010) und (001) und schwach entlang (110)
Fracture
Tenacity
Brittle
Optical Properties
Color
whitecolorless
Birefringence
0,005
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
coarse, massive, prismatic, radial, tabular
Formation
hydrothermal in alkalischen Pegmatiten
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Lovdarite
Composition
Elements
Mass
SiO₂
56,13
TiO₂
0,15
Al₂O₃
1,77
Fe₂O₃
0,18
MnO
0,01
BeO
6,90
MgO
0,06
CaO
0,49
BaO
0,20
Na₂O
14,95
K₂O
6,28
F
0,07
Cl
0,01
H₂O
12,15
P₂O₅
0,05
Russland
Groups and Members
Zeolith-Gruppe
LOV-Zeolith-Strukturgruppe