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]
Quick Facts Names, Identifiers ...
Iron disilicide
| Names |
| IUPAC name
Iron disilicide |
| Other names
Iron(VIII) silicide |
| Identifiers |
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| ChemSpider |
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| ECHA InfoCard |
100.031.507 |
| EC Number |
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InChI=1S/Fe.2Si Key: JRACIMOSEUMYIP-UHFFFAOYSA-N
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| Properties |
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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 |
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Orthorhombic[3] |
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Cmca (No. 64), oS48 |
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a = 0.9863 nm, b = 0.7791 nm, c = 0.7833 nm |
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16 |
| Hazards |
| GHS labelling: |
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Warning |
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H315, H319, H335 |
| Flash point |
Non-flammable |
| Related compounds |
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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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