Mineral - Mosandrite-(Ce)
Mosandrite-(Ce)
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(Ca₃Ce)Na(NaCa)Ti(Si₂O₇)₂(OF)F₂
Unit Cell
a=7,41 b=5,68 c=18,84 β=101° Z=2
Physical Properties
Hardness
4 - 5
Streak
yellow
Density
Normal (2-3,5)
Cleavage
Gut auf (100)
Fracture
conchoidal,
uneven
Tenacity
Brittle
Optical Properties
Color
brownorangeyellow
Birefringence
0,012
Luster
Vitreous
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
coarse, massive, prismatic
Formation
Magmatisch, Pegmatite in Nephelin-Syeniten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Mosandrite-(Ce)
Composition
Elements
Mass
SiO₂
28,64
ZrO₂
1,45
ThO₂
1,04
CaO
24,74
MnO
0,60
MgO
0,63
Fe₂O₃
0,56
Na₂O
1,06
K₂O
0,05
Y₂O₃
2,82
CeO₂
6,34
Ce₂O₃
8,22
TiO₂
8,89
F
2,08
H₂O
7,50
Nb₂O₃
1,40
Al₂O₃
0,40
FeO
0,25
La₂O₃
3,81
Pr₂O₃
1,19
Nd₂O₃
2,13
Sm₂O₃
0,26
Gd₂O₃
0,31
Dy₂O₃
0,32
Er₂O₃
0,39
Yb₂O₃
0,19
Cl
0,04
Norwegen
Groups and Members
Seidozerit-Supergruppe
Rinkit-Gruppe