Curium(III) chloride
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 Crystal structure
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| Identifiers | |
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3D model (JSmol)
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PubChem CID
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| 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)[citation needed] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Curium(III) chloride is the chemical compound with the formula CmCl3.
Structure
Curium(III) chloride has a 9 coordinate tricapped trigonal prismatic geometry.[1]
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:[2]
- 2Cm + 6HCl → 2CmCl3 + 3H2
This method has a number of disadvantages associated with the ongoing processes of hydrolysis and hydration of the resulting compound in an aqueous solution, making it problematic to obtain a pure product using this reaction.
It can be obtained from the reaction of curium nitride with cadmium chloride:[3]
- 2 CmN + 3 CdCl2 → 2 CmCl3 + Cd3N2
References
- ^ Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements (2nd ed.). Butterworth, UK. p. 1270.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ 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. Retrieved 3 July 2023.
- ^ 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. doi:10.1007/s10967-012-2413-7. S2CID 95792512.
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