Iron disilicide
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]
| Names | |
|---|---|
| IUPAC name
Iron disilicide | |
| Other names
Iron(VIII) silicide | |
| 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 | |
Formula units (Z) |
16 |
| Hazards | |
| GHS pictograms |  |
| GHS Signal word | Warning |
| H315, H319, H335 | |
| Flash point | Non-flammable |
| Related compounds | |
Other cations |
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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| Infobox references | |
See also
References
- Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.67. ISBN 9781498754293.
- Rizzi, A.; Rösen, B. N. E.; Freundt, D.; Dieker, Ch.; Lüth, H.; Gerthsen, D. (1995). "Heteroepitaxy of β-FeSi2 on Si by gas-source MBE". Physical Review B. 51 (24): 17780–17794. doi:10.1103/PhysRevB.51.17780. PMID 9978811.
- Dusausoy, Y.; Protas, J.; Wandji, R.; Roques, B. (1971). "Structure cristalline du disiliciure de fer, FeSi2-β". Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 27 (6): 1209–1218. doi:10.1107/S0567740871003765.
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