Mineral - Baotite
Baotite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Ba₄(Ti,Nb,W)₈O₁₆(SiO₃)₄Cl
Unit Cell
a=20.00 c=6.00 Z=16
Physical Properties
Hardness
6
Streak
white
Density
Heavy (3,5-6)
Cleavage
Good after {110}
Fracture
hooked
Tenacity
Brittle
Optical Properties
Color
blackbrownyellow
Birefringence
0.220
Luster
Vitreous
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
tetragonal
Point Group
tetragonal-dipyramidal - 4/m
Space Group
I4 1 /a (88)
Habit
prismatic
Formation
Magmatic, in pegmatites
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Baotite
Composition
Elements
Mass
SiO₂
14.17
TiO₂
29.33
Al₂O₃
1.62
Fe₂O₃
3.07
Cr₂O₃
0.05
Nb₂O₅
11.50
MgO
0.20
CaO
0.41
BaO
37.55
Na₂O
0.20
K₂O
0.13
Cl
2.01
H₂O
0.52
China (Peng 1959)
Name and first discovery: Named after the type locality. First described in 1959.
Chemism:
Synonyms:
Varieties:
Abbreviation: Bao
Literature
Peng, C. I. J. (1959). The discovery of several new minerals of rare elements. AmericanMineralogist, 45, 7-45.