Europium disilicide

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Europium disilicide
Names
IUPAC name
europium; λ3-silanylidynesilicon
Other names
Europium silicide, europium(II) silicide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.032.410 Edit this at Wikidata
EC Number
  • 235-665-8
  • InChI=1S/Eu.2Si
    Key: HWWYYCDRYIYGQB-UHFFFAOYSA-N
  • [Si].[Si].[Eu]
Properties
EuSi2
Molar mass 208.134 g·mol−1
Appearance Dark gray crystals
Density 5.46 g/cm3
Melting point 1,500 °C (2,730 °F; 1,770 K)
insoluble
Structure
tetragonal
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Europium disilicide is a binary inorganic compound of europium and silicon with the chemical formula EuSi2.[1][2][3]

Synthesis

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  • Sintering of pure substances in an inert atmosphere:
Eu + 2Si → EuSi2
Eu2O3 + 7Si → 2EuSi2 + 3SiO2

Physical properties

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Europium disilicide forms dark gray crystals of hexagonal or tetragonal system (space group I41/amd[5]),[6] insoluble in water, cell parameters a = 0.429 nm, c = 1.366 nm.

Uses

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EuSi2-powder exhibits good electrical conductivity, thermal stability, and semiconducting properties. Europium disilicide in the form of thin films finds application in microelectronics.[7][8]

References

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  1. ^ "Europium Silicide Granules | CAS 12434-24-1 | EuSi2 | AMERICAN ELEMENTS ®". American Elements. Retrieved 24 June 2025.
  2. ^ Lide, David R. (9 March 1995). CRC Handbook of Chemistry and Physics: A Ready-reference Book of Chemical and Physical Data. CRC Press. pp. 4–57. ISBN 978-0-8493-0595-5. Retrieved 24 June 2025.
  3. ^ Yaws, Carl L. (6 January 2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals: Physical Properties for More Than 54,000 Organic and Inorganic Chemical Compounds, Coverage for C1 to C100 Organics and Ac to Zr Inorganics. Gulf Professional Publishing. p. 709. ISBN 978-0-12-801146-1. Retrieved 24 June 2025.
  4. ^ ORNL. Technical Information Service. p. 79. Retrieved 24 June 2025.
  5. ^ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. T-171. Retrieved 24 June 2025.
  6. ^ "Europium Disilicide Powder, EuSi2, CAS 12434-24-1 - Heeger Materials". Heeger Materials. Retrieved 24 June 2025.
  7. ^ Averyanov, Dmitry V.; Tokmachev, Andrey M.; Karateeva, Christina G.; Karateev, Igor A.; Lobanovich, Eduard F.; Prutskov, Grigory V.; Parfenov, Oleg E.; Taldenkov, Alexander N.; Vasiliev, Alexander L.; Storchak, Vyacheslav G. (23 May 2016). "Europium Silicide – a Prospective Material for Contacts with Silicon". Scientific Reports. 6 (1) 25980. Bibcode:2016NatSR...625980A. doi:10.1038/srep25980. ISSN 2045-2322. PMC 4876492. PMID 27211700.
  8. ^ Sicius, Hermann (28 October 2024). Handbook of the Chemical Elements. Springer Nature. p. 941. ISBN 978-3-662-68921-9. Retrieved 24 June 2025.