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.

Iron disilicide
Names
IUPAC name
Iron disilicide
Other names
Iron(VIII) silicide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.507
EC Number
  • 234-671-8
PubChem CID
  • InChI=1S/Fe.2Si
    Key: JRACIMOSEUMYIP-UHFFFAOYSA-N
SMILES
  • [Si]=[Fe]=[Si]
Properties
FeSi2
Molar mass 112.016 g/mol
Appearance gray tetragonal crystals
Density 4.74 g/cm3
Melting point 1,220 °C (2,230 °F; 1,490 K)
Band gap 0.87 eV (ind.)
Electron mobility 1200 cm2/(V·s)
Structure
Orthorhombic
Space group
Cmca (No. 64), oS48
a = 0.9863 nm, b = 0.7791 nm, c = 0.7833 nm
16
Hazards
GHS labelling:
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).
N (what is YN ?)
Infobox references
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