Europium disilicide

Europium disilicide

Names
IUPAC name europium; λ3-silanylidynesilicon
Other names Europium silicide, europium(II) silicide
Identifiers
CAS Number	12434-24-1  Y
3D model (JSmol)	Interactive image
ECHA InfoCard	100.032.410
EC Number	235-665-8
PubChem CID	170843614
CompTox Dashboard (EPA)	DTXSID701312271
InChI InChI=1S/Eu.2Si Key: HWWYYCDRYIYGQB-UHFFFAOYSA-N
SMILES [Si].[Si].[Eu]
Properties
Chemical formula	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)
Solubility in water	insoluble
Structure
Crystal structure	tetragonal
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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

Synthesis

• Sintering of pure substances in an inert atmosphere:

Eu + 2Si → EuSi₂

• Reduction of europium(III) oxide by silicon in vacuum: ^[4]

Eu₂O₃ + 7Si → 2EuSi₂ + 3SiO₂

Physical properties

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

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

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.