Chemical formula: FeO x SiO2
Melting point: No data
Density: 3.4-3.5, average=3.45 g/cm3
Microhardnes: No data
Hardness (Moh's): 5-6
Luminescence: Non-fluorescent
Crystal system: Monoclinic
Cell dimensions: a=9.53 A, b=18.26 A, c=5.3 A
PDF number: 00-027-1170
ICSD number: 024590
Note: It has been reported that FeSiO3 is unstable in the pure condition (Kiessling and Lange, 1964).

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