Mineral - Bazzite
Bazzite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Be₃Sc₂(Si₆O₁₈)
Unit Cell
a=9.52 c=9.17 Z=2
Physical Properties
Hardness
6.5 - 7
Streak
white
Density
Normal (2-3,5)
Cleavage
Indistinct after {0001}
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
blue
Birefringence
0.020
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
X: Grün-Gelb
Y: Blau
Geomineralogical Properties
Crystal System
hexagonal
Point Group
dihexagonal-dipyramidal - 6/m 2/m 2/m
Space Group
P6/mcc (192)
Habit
prismatic
Formation
Magmatic, in pegmatites
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Bazzite
Composition
Elements
Mass
SiO₂
58.80
Al₂O₃
0.25
Fe₂O₃
2.21
Sc₂O₃
14.44
FeO
3.68
MnO
1.58
BeO
12.90
MgO
0.82
Li₂O
[0.24]
Na₂O
2.82
K₂O
0.22
Rb₂O
0.037
Cs₂O
0.31
H₂O
2.60
Kazakhstan (Artini 1915)
Groups and Members
Beryl-Group
Name and first discovery: Named after the Italian engineer Alessandro Eugenio Bazzi (1892-1929), who was the first to find the mineral in 1945.
Chemism:
Synonyms:
Varieties:
Abbreviation: Bz
Literature
Artini, E. (1915). Dueminerali di Baveno contenenti terre rare: weibyeïte e bazzite. Tip. R. Accademia Dei Lincei.