Iron disilicide

Iron disilicide
Names
IUPAC name Iron disilicide
Other names Iron(VIII) silicide
Identifiers
CAS Number	12022-99-0^Y
3D model (JSmol)	Interactive image
ChemSpider	4891873^Y
ECHA InfoCard	100.031.507
EC Number	234-671-8
PubChem CID	6336880
CompTox Dashboard (EPA)	DTXSID00892427
InChI InChI=1S/Fe.2Si Key: JRACIMOSEUMYIP-UHFFFAOYSA-N
SMILES [Si]=[Fe]=[Si]
Properties
Chemical formula	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
Crystal structure	Orthorhombic^[3]
Space group	Cmca (No. 64), oS48
Lattice constant	a = 0.9863 nm, b = 0.7791 nm, c = 0.7833 nm
Formula units (Z)	16
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	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). N (what is ^YN ?) Infobox references

Chemical compound

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]

References

^ ^a ^b ^c 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. Bibcode:1995PhRvB..5117780R. doi:10.1103/PhysRevB.51.17780. PMID 9978811.
^ ^a ^b 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.