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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
Cl 3 Cm
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 CmCl 3 .

Structure [ edit ]

Curium(III) chloride has a 9 coordinate tricapped trigonal prismatic geometry . [1]

Synthesis [ edit ]

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 → CmCl 3 + H 2 O

It can also be obtained from the dissolution of metallic curium in dilute hydrochloric acid : [2]

2Cm + 6HCl → 2CmCl 3 + 3H 2

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 CdCl 2 → 2 CmCl 3 + Cd 3 N 2

References [ edit ]

  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 . Retrieved 3 July 2023 .
  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. doi : 10.1007/s10967-012-2413-7 . S2CID   95792512 .


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