Curium(III) chloride
Chemical compound
From Wikipedia, the free encyclopedia
Curium(III) chloride or curium trichloride is a actinide chemical compound with the chemical formula CmCl3.
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 Crystal structure | |
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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) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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 in H2O
This 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:[3]
- 2 CmN + 3 CdCl2 → 2 CmCl3 + Cd3N2
