Gadolinium disilicide

Last updated
Gadolinium disilicide
Names
Other names
Gadolinium silicide
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 235-216-6
PubChem CID
  • InChI=1S/Gd.2Si/q+3;;
    Key: MDYZLTUIAFSQMZ-UHFFFAOYSA-N
  • [Si].[Si].[Gd+3]
Properties
GdSi2
Molar mass 213.42 g·mol−1
AppearanceСrystals
Density 5.9 g/cm3
Melting point 1,540 °C (2,800 °F; 1,810 K)
insoluble
Structure
Hexagonal, orthorhombic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Gadolinium disilicide is a binary inorganic compound of gadolinium and silicon with the chemical formula GdSi2. [1] [2] [3]

Contents

Synthesis

GdSi2 can be produced by heating gadolinium and silicon in the presence of mercury. The mercury is removed by distillation after the reaction. [4] The compound can also be produced by the reaction of magnesium silicide and gadolinium chloride. [5] [6]

Physical properties

The compound features a metallic luster and exceptional thermal stability with a high melting point, ideal for high-temperature environments. Its semiconducting behavior varies with temperature and doping, while its hexagonal crystal structure (space group P6/mmm) [7] underpins distinctive electronic and magnetic properties. [8]

Gadolinium disilicide also exists in orthorhombic form, space group Imam. [9] [10]

Chemical properties

The compound is easily oxidized when heated; this fact limits its applications. [5]

Uses

Key applications include: thermoelectric materials leveraging electrical conductivity and thermal insulation, advanced electronics (e.g., spintronics) due to gadolinium’s intrinsic magnetism, magnetic materials research, where its phenomena are studied for novel device integration. [8]

The compound remains a focal point in materials science and condensed matter physics for its multifunctional characteristics. [8]

References

  1. ↑ "Gadolinium silicide | CAS 12134-75-7 | SCBT - Santa Cruz Biotechnology". scbt.com . Retrieved 1 July 2025.
  2. ↑ Lukashenko, G. M.; Polotskaya, R. I. (1 June 1986). "Thermodynamic properties of gadolinium disilicide". Soviet Powder Metallurgy and Metal Ceramics. 25 (6): 504–505. doi:10.1007/BF00792390. ISSN   1573-9066 . Retrieved 1 July 2025.
  3. ↑ Usui, Hiroyuki; Nomura, Masahito; Nishino, Hiroki; Kusatsu, Masatoshi; Murota, Tadatoshi; Sakaguchi, Hiroki (1 September 2014). "Gadolinium silicide/silicon composite with excellent high-rate performance as lithium-ion battery anode". Materials Letters . 130: 61–64. Bibcode:2014MatL..130...61U. doi:10.1016/j.matlet.2014.05.065. ISSN   0167-577X . Retrieved 1 July 2025.
  4. ↑ Mayer, Isaac; Yanir, E.; Shidlovsky, Igal (1 April 1967). "Dimorphism of rare earth disilicides". Inorganic Chemistry . 6 (4): 842–844. doi:10.1021/ic50050a043. ISSN   0020-1669 . Retrieved 1 July 2025.
  5. 1 2 Suu, H. V.; Mezey, G.; Petö, G.; Pászti, F.; Kótai, E.; Manuaba, A.; Fried, M.; Gyulai, J. (1 April 1986). "Oxidation behaviour of GdSi2 studied by RBS". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms . 15 (1): 247–249. doi:10.1016/0168-583X(86)90295-8. ISSN   0168-583X . Retrieved 1 July 2025.
  6. ↑ Fitzmaurice, Jonathan C.; Hector, Andrew L.; Parkin, Ivan P.; Rowley, Adrian T. (1 April 1995). "Synthesis of Metal Silicide Powders by Thermolysis of Metal Chlorides with Magnesium Silicide". Phosphorus, Sulfur, and Silicon and the Related Elements. 101 (1–4): 47–55. doi:10.1080/10426509508042498. ISSN   1042-6507 . Retrieved 1 July 2025.
  7. ↑ Donnay, Joseph Désiré Hubert (1978). Crystal Data: Inorganic compounds 1967-1969. National Bureau of Standards. p. 117. Retrieved 1 July 2025.
  8. 1 2 3 "CAS 12134-75-7: Gadolinium silicide (GdSi2) | CymitQuimica". cymitquimica.com. Retrieved 1 July 2025.
  9. ↑ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. 10. Retrieved 1 July 2025.
  10. ↑ Haynes, William M. (6 June 2011). CRC Handbook of Chemistry and Physics. CRC Press. pp. 4–64. ISBN   978-1-4398-5512-6 . Retrieved 1 July 2025.
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