Mineral - Fluorcaphite
Fluorcaphite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Ca(Sr,Na,Ca)(Ca,Sr,REE)₃(PO₄)₃(F,OH)
Unit Cell
a=9,49 c=7,00 Z=2
Physical Properties
Hardness
5
Streak
white
Density
Cleavage
Fracture
Tenacity
Brittle
Optical Properties
Color
yellowcolorless
Birefringence
0,012
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
hexagonal
Point Group
Space Group
Habit
coarse, granular, massive, prismatic
Formation
Magmatisch, in Miarolen von alkalischen Pegmatiten
Paragenesis
Twinning
Rarity
Rare
Synonyms
Fluorcaphite
Composition
Elements
Mass
P₂O₅
36,23
SiO₂
0,57
La₂O₃
2,61
Ce₂O₃
4,78
Pr₂O₃
0,34
Nd₂O₃
1,48
Sm₂O₃
0,14
CaO
30,46
SrO
20,78
BaO
0,03
Na₂O
1,74
F
2,17
H₂O
0,52
Russland