Chemistry:Samarium disilicide
From HandWiki
| Names | |
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| Other names
Samarium silicide, samarium(II) silicide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| EC Number |
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CompTox Dashboard (EPA)
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| Properties | |
| Si2Sm | |
| Molar mass | 206.53 g·mol−1 |
| Appearance | Crystals |
| Density | 7.54 g/cm3 |
| insoluble | |
| Structure | |
| Orthorhombic | |
| α-SmSi 2 orthorhombic β-SmSi | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Tracking categories (test):
Samarium disilicide is a binary inorganic compound of samarium and silicon with the chemical formula SmSi
2.[1][2]
Synthesis
SmSi
2 is prepared by reducing samarium oxide with silicon in vacuum at 1550-1600 °C.
Physical properties
Samarium disilicide exists in two crystalline modifications: α-SmSi
2 and β-SmSi
2, with lattices of the YSi
2 orthorhombic (space group I mma) and ThSi
2 tetragonal (space group I41/amd.[3]) types respectively and a transformation temperature of 380 °C.[4]
The compound melts congruently at a temperature of ≈1800 °C.[5]
References
- ↑ Kuzmin, M. V; Remele, V. E. (2025). "Numerical model for studying 3D-island films by Auger electron spectroscopy. The Sm-Si(111)". Physics of the Solid State (1): 177. https://j.ioffe.ru/articles/60598. Retrieved 29 June 2025.
- ↑ Costescu, Ruxandra M.; Gheorghe, Nicoleta G.; Husanu, Marius A.; Lungu, George A.; Macovei, Dan; Pintilie, Ioana; Popescu, Dana G.; Teodorescu, Cristian M. (1 October 2012). "Epitaxial ferromagnetic samarium and samarium silicide synthesized on Si(001)" (in en). Journal of Materials Science 47 (20): 7225–7234. doi:10.1007/s10853-012-6672-z. ISSN 1573-4803. Bibcode: 2012JMatS..47.7225C. https://link.springer.com/article/10.1007/s10853-012-6672-z. Retrieved 29 June 2025.
- ↑ Donnay, Joseph Désiré Hubert (1973) (in en). Crystal Data: Inorganic compounds. National Bureau of Standards. p. T-173. https://books.google.com/books?id=5lVCBwmZsLYC&dq=Samarium+disilicide&pg=RA4-PA173. Retrieved 29 June 2025.
- ↑ Samsonov, G. V. (December 1962). "THE CHEMISTRY OF THE SILICIDES OF THE RARE-EARTH ELEMENTS". Russian Chemical Review: 710. https://www.russchemrev.org/RCR1333pdf. Retrieved 29 June 2025.
- ↑ Gokhale, A. B.; Abbaschian, G. J. (1 October 1988). "The Si-Sm (Silicon-Samarium) system" (in en). Bulletin of Alloy Phase Diagrams 9 (5): 582–585. doi:10.1007/BF02881960. ISSN 0197-0216. https://link.springer.com/article/10.1007/BF02881960. Retrieved 29 June 2025.
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