Iron monosilicide

Iron monosilicide (FeSi) is an intermetallic compound, a silicide of iron that occurs in nature as the rare mineral naquite. It is a semiconductor with unusual magnetic properties at low temperatures. It has a cubic crystal lattice with no inversion center; therefore its magnetic structure is helical, with right-hand and left-handed chiralities.[3]

Iron monosilicide

Structures of left-handed and right-handed FeSi crystals (3 presentations, with different numbers of atoms per unit cell)
Names
IUPAC name
Iron silicide
Other names
Naquite, fersilicite
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.506
EC Number
  • 234-670-2
UNII
Properties
FeSi
Molar mass 83.931 g/mol
Appearance gray cubic crystals[1]
Density 6.1 g/cm3[1]
Melting point 1,410 °C (2,570 °F; 1,680 K)[1]
Band gap 0.05 eV (ind.)
0.14 eV (dir.)[2]
Structure
Cubic[3]
P213 (No. 198), cP8
a = 0.44827(1) nm
4
Hazards
Flash point Non-flammable
Related compounds
Other anions
 Iron germanide
Other cations
 Cobalt silicide
Manganese silicide
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

See also

References
  1. Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.68. ISBN 9781498754293.
  2. Galakhov, V R; Kurmaev, E Z; Cherkashenko, V M; Yarmoshenko, Yu M; Shamin, S N; Postnikov, A V; Uhlenbrock, S; Neumann, M; Lu, Z W; Klein, B M; Shi, Zhu-Pei (1995). "Electronic structure of FeSi". Journal of Physics: Condensed Matter. 7 (28): 5529–5535. doi:10.1088/0953-8984/7/28/010.
  3. Stishov, Sergei M.; Petrova, Alla E. (2011). "Itinerant helimagnetic compound MnSi". Uspekhi Fizicheskih Nauk. 181 (11): 1157. doi:10.3367/UFNr.0181.201111b.1157.
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