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Forsterite
IMA-Approved Mineral Species
Properties and Data
Physical Properties
Composition
Mg
2
SiO
4
Chemical Name
Magnesium Silicate
Molecular Weight
140.691 g/mol
Density
3.23 - 3.275 g/cm
3
Mohs Hardness
6.5 - 7
Member of
Olivine Group
Crystal System
Orthorhombic
Optical Properties
Type
Biaxial (+)
Refractive Index
n
α
= 1.636 - 1.73
n
β
= 1.65 - 1.739
n
γ
= 1.669 - 1.772
Dispersion Factor
0.015
Birefringence
δ = 0.033 - 0.042
Additional Information
Material articles have temporarily been disabled for renewal and polishing.
Variants and Types
Intrinsic
Intrinsic
Color: Colorless
Production and Synthesis
Czochralski Method
Czochralski Method
Involves pulling a crystal (boule) upward from a molten solution. Produces some of the purest crystals but requires a cleanroom environment.
References
REFERENCES
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