Names | |
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IUPAC name
Iron disilicide
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Other names
Iron(VIII) silicide
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.031.507 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
FeSi2 | |
Molar mass | 112.016 g/mol |
Appearance | gray tetragonal crystals[1] |
Density | 4.74 g/cm3[1] |
Melting point | 1,220 °C (2,230 °F; 1,490 K)[1] |
Band gap | 0.87 eV (ind.)[2] |
Electron mobility | 1200 cm2/(V·s) |
Structure | |
Orthorhombic[3] | |
Cmca (No. 64), oS48 | |
a = 0.9863 nm, b = 0.7791 nm, c = 0.7833 nm
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Formula units (Z)
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16 |
Hazards | |
GHS labelling: | |
Warning | |
H315, H319, H335 | |
Flash point | Non-flammable |
Related compounds | |
Other cations
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Cobalt disilicide Manganese disilicide Titanium disilicide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Iron disilicide (FeSi2) is an intermetallic compound, a silicide of iron that occurs in nature as the rare mineral linzhiite. At room temperature it forms orthorhombic crystals (β phase), which convert into a tetragonal α phase upon heating to 970 °C.[3]