Mineral - Baratovite
Baratovite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
KCa₇(Ti,Zr)₂Li₃Si₁₂O₃₆F₂
Unit Cell
a=16.94 b=9.75 c=20.91 β=113° Z=4
Physical Properties
Hardness
5 - 6
Streak
white
Density
Normal (2-3,5)
Cleavage
Perfect after {001}
Fracture
Tenacity
Brittle
Optical Properties
Color
whitecolorless
Birefringence
0.008
Luster
Vitreous,
Pearly
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
C2/c (15)
Habit
coarse, massive, tabular
Formation
In magmatic rocks (e.g. syenites) and their pegmatites
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Baratovite
Composition
Elements
Mass
SiO₂
50.46
TiO₂
9.55
ZrO₂
2.28
Fe₂O₃
0.50
Nb₂O₅
0.72
MnO
0.12
CaO
30.36
Li₂O
2.05
Na₂O
0.70
K₂O
2.96
F
1.05
Tajikistan (Dusmatov et al. 1976)
Name and first discovery: Named after the Tajik petrologist Rauf Baratovich Baratov (1921-2013). First described in 1975.
Chemism:
Synonyms:
Varieties:
Abbreviation: Bao
Literature
Dusmatov, V. D., Semenov, Y. I., Khomyakov, A. P., Bykova, A. V., & Dzhafarov, K. K. (1976). Baratovite, a new mineral. InternationalGeology Review, 18(7), 851-852.