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Enstatite
Chemical formula: Mg2Si2O6
Modifications: Three modifications of MgO x SiO2 are known: enstatite, proto-enstatite, and clinoenstatite. The transformations are influenced by temperature and high pressure.
Melting point: 1557oC
Density: 3.1-3.3 g/cm3
Microhardnes: No data
Hardness (Moh's): 5.5
Luminescence: Non-fluorescent
Crystal system: Orthorhombic
Cell dimensions: a=8.86 A, b=18.2 A, c=5.2 A
PDF number: 00-002-0546
ICSD number: 037313
Note: Enstatite is a possible reaction product between different refractories and slags.