Mineral - Carletonite
Carletonite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
KNa₄Ca₄Si₈O₁₈(CO₃)₄(OH,F)·H₂O
Unit Cell
a=13.18 c=16.70 Z=4
Physical Properties
Hardness
4 - 4.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Perfect after {001}, distinct after {110}
Fracture
conchoidal
Tenacity
Brittle
Optical Properties
Color
bluepinkcolorless
Birefringence
0.004
Luster
Vitreous,
Pearly
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
tetragonal
Point Group
ditetragonal-dipyramidal - 4/m 2/m 2/m
Space Group
P4/mbm (127)
Habit
blocky, coarse, prismatic, tabular
Formation
Magmatisch
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Carletonite
Composition
Elements
Mass
SiO₂
44.90
TiO₂
0.01
Al₂O₃
0.50
MgO
0.09
CaO
19.92
Na₂O
10.23
K₂O
3.28
F
0.70
H₂O
4.21
CO₂
19.92
Canada (Chao 1971)