Curium(III) chloride
{{Chembox
|Name=Curium(III) chloride
|ImageFile = Curium(III) chloride.jpg
|ImageFile1 = UCl3 without caption.png
|ImageCaption1 = Crystal structure
|Section1={{Chembox Identifiers
|InChI = InChI=1S/3ClH.Cm/h3*1H;/q;;;+3/p-3
|InChIKey = PTLGMSBPLOHNBD-UHFFFAOYSA-K
|CASNo = 13537-20-7
|PubChem = 57418588
|SMILES = Cl[Cm](Cl)Cl
}}
|Section2={{Chembox Properties
|Cm=1 | Cl=3
|Appearance = White solid (anhydrous)
Light green solid (hydrate)
|MeltingPtC = 695
|MeltingPt_ref = {{cn|date=January 2022}}
}}
}}
Curium(III) chloride is the chemical compound with the formula CmCl3.
Structure
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:
:{{chem2|CmOCl + 2HCl -> CmCl3 + H2O}}
It can also be obtained from the dissolution of metallic curium in dilute hydrochloric acid:{{cite journal |last1=Wallmann |first1=J. C. |last2=Fuger |first2=J. |last3=Peterson |first3=J. R. |last4=Green |first4=J. L. |title=Crystal structure and lattice parameters of curium trichloride |journal=Journal of Inorganic and Nuclear Chemistry |date=1 November 1967 |volume=29 |issue=11 |pages=2745–2751 |doi=10.1016/0022-1902(67)80013-7 |s2cid=97334114 |url=https://www.sciencedirect.com/science/article/abs/pii/0022190267800137 |access-date=3 July 2023 |language=en |issn=0022-1902|url-access=subscription }}
:
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:{{cite journal |last1=Hayashi |first1=Hirokazu |last2=Takano |first2=Masahide |last3=Otobe |first3=Haruyoshi |last4=Koyama |first4=Tadafumi |title=Syntheses and thermal analyses of curium trichloride |journal=Journal of Radioanalytical and Nuclear Chemistry |date=July 2013 |volume=297 |issue=1 |pages=139–144 |doi=10.1007/s10967-012-2413-7 |bibcode=2013JRNC..297..139H |s2cid=95792512}}
:{{chem2|2 CmN + 3 CdCl2 -> 2 CmCl3 + Cd3N2}}
References
{{reflist}}
{{Curium compounds}}
{{Chlorides}}
{{Actinide halides}}
{{nuclear-tech-stub}}
{{inorganic-compound-stub}}