Americium(III) chloride

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Americium(III) chloride
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Template:Longitem Template:Chembox Elements/molecular formula
Molar mass Template:Chem molar mass
Appearance Light red, opaque crystals
Density 5.87 g cm−3[1]
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Template:Longitem hexagonal (UCl3 type), hP8
Template:Longitem P63/m, No. 176
Template:Longitem Tricapped trigonal prismatic
(nine-coordinate)
Template:Longitem Americium(III) fluoride
Americium(III) bromide
Americium(III) iodide
Template:Longitem Plutonium(III) chloride
Curium(III) chloride
Europium(III) chloride
Template:Longitem Americium(II) chloride

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Americium(III) chloride or americium trichloride is the chemical compound composed of americium and chlorine with the formula AmCl3. This salt forms pink hexagonal crystals. In the solid state each americium atom has nine chlorine atoms as near neighbours, at approximately the same distance, in a tricapped trigonal prismatic configuration.[2][3]

The hexahydrate has a monocline crystal structure with: a = 970.2 pm, b = 656.7 pm and c = 800.9 pm; β = 93° 37'; space group: P2/n.[4]

Reactions

An americium(III) chloride electrorefining method has been investigated to separate mixtures of actinides, since the standard Gibbs free energy of formation of americium(III) chloride is much different than the rest of the actinide chlorides.[5] This can be used to remove americium from plutonium by melting the crude mixture together with salts such as sodium chloride.[6]

References

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  1. ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
  2. ↑ L. B. Asprey, T. K. Keenan, F. H. Kruse: "Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium", Inorg. Chem. 1965, 4 (7), 985–986; Script error: No such module "CS1 identifiers"..
  3. ↑ A. F. Wells: Structural Inorganic Chemistry 5th edition (1984) Oxford Science Publications, Template:ISBN.
  4. ↑ John H. Burns, Joseph Richard Peterson: "The Crystal Structures of Americium Trichloride Hexahydrate and Berkelium Trichloride Hexahydrate", Inorg. Chem. 1971, 10 (1), 147–151; Script error: No such module "CS1 identifiers"..
  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".

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Template:Americium compounds Template:Chlorides Template:Actinide halides


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