Mineral - Cancrinite
Cancrinite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Na₆Ca₂[(CO₃)₂|Al₆Si₆O₂₄] · 2 H₂O
Unit Cell
Physical Properties
Hardness
5 - 6
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
orangeyellowcolorless
Birefringence
0.020
Luster
Vitreous,
Greasy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
hexagonal
Point Group
hexagonal-pyramidal - 6
Space Group
P6 3 (173)
Habit
massive, prismatic
Formation
Verwitterung, Magmatisch
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Cancrinite
Groups and Members
Feldspathoid-Supergroup
Cancrinite-Group