FORSTERITE

Empirical Formula: Mg2SiO4
Molecular Weight: 0
MDL number: MFCD00283278
EINECS: 215-681-1
Update Date: 2026-03-31 17:23:26

What is FORSTERITE?

Description

Forsterite (Mg2SiO4) is the magnesium-rich endmemberof the Olivine solidsolutionseries. Forsterite crystallizes in the orthorhombic system(space group = Pbnm) with cell parameters a = 4.75 ?(0.475 nm), b = 10.20 ? (1.020 nm) and c = 5.98 ? (0.598 nm). Forsterite is associated with igneous and metamorphic rocks and has also been found in meteorites.
Forsterite is associated with igneous and metamorphic rocks and has also been found in meteorites. In 2005, it was also found in cometary dust returned by the “Stardust” probe in space.

Physical properties

Habit: prismatic, tabular.
Color: white, yellow, or greenish yellow.
Diaphaneity: transparent to translucent.
Luster: vitreous (i.e., glassy).
Streak: white.
Cleavage: (010) good, (001) poor.
Fracture: conchoidal.
Chemical: attacked by concentrated HCl with formation of a gel of silica.
Melting point: 1898°C.

Properties of FORSTERITE

refractive index	1.63
form	Naturally Occurring Mineral, Grains, Approximately 0.06 To 0.19 in.
color	Light green
Dielectric constant	6.2（Ambient）

Safety information for FORSTERITE

Computed Descriptors for FORSTERITE

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