Mineral - Lévyne-(Ca)
Lévyne-(Ca)
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(Ca,Na₂,K₂)[Al₂Si₄O₁₂] · 6H₂O
Unit Cell
a=13,34 c=23,01 Z=3
Physical Properties
Hardness
4 - 4.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Undeutlich auf (101)
Fracture
conchoidal,
uneven
Tenacity
Brittle
Optical Properties
Color
whitebrownredorangeyellowbrown whitecolorless
Birefringence
0.002 - 0.008
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
trigonal
Point Group
Space Group
Habit
leafy, lamellar, tabular
Formation
hydrothermal, in vulkanischen Basalten
Paragenesis
Twinning
Durchdringungszwillinge auf (001)
Rarity
Common
Synonyms
Lévyne-(Ca)
Composition
Elements
Mass
SiO₂
46,76
Al₂O₃
21,91
CaO
11,12
Na₂O
1,34
K₂O
0,21
H₂O
18,65
Colorado
Groups and Members
Zeolith-Gruppe
LEV-Zeolith-Strukturgruppe
Lévyn-Serie