Mineral - Barylite
Barylite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Be₂Ba(Si₂O₇)
Unit Cell
a=11.67 b=9.82 c=4.69 Z=4
Physical Properties
Hardness
7
Streak
white
Density
Heavy (3,5-6)
Cleavage
Fracture
Tenacity
Brittle
Optical Properties
Color
whiteblue whiteblue greypink whitecolorless
Birefringence
0.010
Luster
Vitreous,
Greasy
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Habit
lath-shaped, radial, prismatic, tabular
Formation
Magmatic, in felsic plutonites and their pegmatites
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Barylite
Composition
Elements
Mass
SiO₂
35.51
Al₂O₃
0.05
Fe₂O₃
0.04
BeO
16.01
MgO
0.21
CaO
0.42
BaO
47.43
H₂O
0.57
Sweden (Dana 1892)
Name and first discovery: Named after the Greek words "barys" for "heavy" and "lithos" for "stone", due to its increased density. First described in 1876
Chemism:
Synonyms:
Varieties:
Abbreviation: By
Literature
Dana, J. D., & Dana, E. S. (1892). Thesystem of mineralogy of James Dwight Dana, 1837-1868: descriptive mineralogy. J. Wiley & sons.