Mineral - Shomiokite-(Y)
Shomiokite-(Y)
Chemical Properties
Mineral Class
Carbonates
Toxicity
radioactive
Formula
Na₃(Y,REE)[CO₃]₃ · 3H₂O
Unit Cell
a=10,10 b=17,35 c=6,00 Z=4
Physical Properties
Hardness
2 - 3
Streak
white
Density
Normal (2-3,5)
Cleavage
Perfekt auf (110)
Fracture
Tenacity
Optical Properties
Color
whiteyellowpinkyellow whitepink whitecolorless
Birefringence
0,003
Luster
Vitreous,
Silky,
Waxy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
granular, massive, acicular, prismatic, prismatic, radial
Formation
Magmatisch, in alkalischen Pegmatiten, wie Gabbro-Syeniten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Shomiokite-(Y)
Composition
Elements
Mass
CO₂
33,36
Y₂O₃
19,05
La₂O₃
0,20
Ce₂O₃
1,81
Pr₂O₃
0,52
Nd₂O₃
2,79
Sm₂O₃
0,95
Gd₂O₃
1,05
Tb₂O₃
0,36
Dy₂O₃
2,81
Ho₂O₃
0,73
Er₂O₃
2,13
Eu₂O₃
0,01
Yb₂O₃
1,55
Lu₂O₃
0,26
CaO
0,01
Na₂O
23,24
H₂O
13,65
Kanada