Title: A High-Pressure Structure in Curium Linked to Magnetism
Authors: HEATHMAN STEPHENHAIRE R.g.LE BIHAN T.LINDBAUM AndreasIDIRI MoniqueNORMILE PeterLI S.AHUJA R.JOHANSSON B.LANDER Gerard
Citation: SCIENCE vol. 309 no. 5731 p. 110-113
Publisher: AMER ASSOC ADVANCEMENT SCIENCE
Publication Year: 2005
JRC Publication N°: JRC30472
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC30472
Type: Articles in Journals
Abstract: Curium lies at the center of the actinide series and has a half-filled shell with seven 5f electrons spatially residing inside its radon core. As a function of pressure, curium ibits five different crystallographic phases up to 100 gigapascals, of which all but one are so found in the preceding element, americium. We describe here a structure in curium, Cm III, with monoclinic symmetry, space group C2/c, found at intermediate pressures (between 37 and 56 gigapascals). Ab initio electronic structure calculations agree with the observed sequence of structures and establish that it is the spin polarization of curium's 5f electrons that stabilizes Cm III. The results reveal that curium is one of a few elements that has a lattice structure stabilized by magnetism.
JRC Institute:Institute for Transuranium Elements

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