Curium(III) chloride

Curium(III) chloride
Crystal structure
Identifiers
3D model (JSmol)
  • InChI=1S/3ClH.Cm/h3*1H;/q;;;+3/p-3
    Key: PTLGMSBPLOHNBD-UHFFFAOYSA-K
  • Cl[Cm](Cl)Cl
Properties
Cl3Cm
Molar mass 353 g·mol−1
Appearance White solid (anhydrous)
Light green solid (hydrate)
Melting point 695 °C (1,283 °F; 968 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Curium(III) chloride or curium trichloride is a actinide chemical compound with the chemical formula CmCl3.

Structure

Curium(III) chloride has a 9 coordinate tricapped trigonal prismatic geometry.

Synthesis

Curium(III) chloride can be obtained from the reaction of hydrogen chloride gas with curium dioxide, curium(III) oxide, or curium(III) oxychloride at a temperature of 400-600 °C:

CmOCl + 2HCl → CmCl3 + H2O

It can also be obtained from the dissolution of metallic curium in dilute hydrochloric acid:

2Cm + 6HCl → 2CmCl3 + 3H2 in H2O

This latter method is complicated by the ongoing processes of hydrolysis and hydration of the resulting compound in an aqueous solution, making it problematic to obtain a pure product.

It can be obtained from the reaction of curium nitride with cadmium chloride:

2 CmN + 3 CdCl2 → 2 CmCl3 + Cd3N2

References

  1. ↑ Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements (2nd ed.). Butterworth, UK. p. 1270.{{cite book}}: CS1 maint: location missing publisher (link)
  2. ↑ Wallmann, J. C.; Fuger, J.; Peterson, J. R.; Green, J. L. (1 November 1967). "Crystal structure and lattice parameters of curium trichloride". Journal of Inorganic and Nuclear Chemistry. 29 (11): 2745–2751. doi:10.1016/0022-1902(67)80013-7. ISSN 0022-1902. S2CID 97334114.
  3. ↑ Hayashi, Hirokazu; Takano, Masahide; Otobe, Haruyoshi; Koyama, Tadafumi (July 2013). "Syntheses and thermal analyses of curium trichloride". Journal of Radioanalytical and Nuclear Chemistry. 297 (1): 139–144. Bibcode:2013JRNC..297..139H. doi:10.1007/s10967-012-2413-7. S2CID 95792512.