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Minerals - Enstatite | TerraCollect
Mineral - Enstatite
Enstatite
Mg₂Si₂O₆
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Mg₂Si₂O₆
Unit Cell
a=18.23 b=8.84 c=5.19 Z=8
Physical Properties
Hardness
5 - 6
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
white
brown
yellow
green
colorless
Birefringence
0.011
Luster
Vitreous,
Pearly
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
Composition
Elements
Mass
SiOâ‚‚
58.84
Al₂O₃
0.88
Fe₂O₃
0.72
Cr₂O₃
0.25
FeO
3.93
MnO
0.02
MgO
34.71
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Distinct after {210}
Fracture
uneven
Tenacity
Brittle
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Pbca (61)
Habit
blocky,
fibrous,
acicular,
prismatic,
tabular
Formation
Magmatic, Metamorphism
Paragenesis
Twinning
Rarity
Common
Synonyms
Enstatite
CaO
0.50
Naâ‚‚O
0.23
Kâ‚‚O
0.08
Hâ‚‚O
0.21
Lesotho (Dana 1895)
Groups and Members
Pyroxene-Group
Orthopyroxene-Subgroup
