Curium(III) chloride

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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)[citation needed]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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

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

  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. S2CID 97334114
    . Retrieved 3 July 2023.
  3. S2CID 95792512
    .


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