Electronic, structural and transport properties of (almost) rare-earth-like actinide hydrides

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6883150

Ward, J W; Cort, B; Goldstone, J A; Lawson, A C; Cox, L E ^[1]; Haire, R G ^[2]

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1. Los Alamos National Lab., NM (USA)
2. Oak Ridge National Lab., TN (USA)

By the virtue of broad-band, hybridized 5f-electron behavior, the hydride systems for Pa and U exhibit unique properties and structures, the actinide metal atoms existing in different states. A sudden change at Np to more rare-earth-like behavior implies a major change in electronic structure. There are both many parallels but also enigmas for the Np + H and Pu + H systems. Electrical resistivities are large and complex with temperature. Low-temperature structural transitions as studied by neutron diffraction help elucidate some of these effects. Phonon spectra are quite rare-earth-like, and XPS data imply a metal atom with mostly d-screened core levels. Then it is at americium, where fully localized and corelike 5f electrons are found, that we look finally for true rare-earth-like behavior, which should include a large drop in electrical resistivity. 33 refs., 7 figs., 1 tab.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6883150
• Report Number(s): LA-UR-90-2792; CONF-900802-5; ON: DE90016491
• Resource Relation: Conference: 200. American Chemical Society national meeting, Washington, DC (USA), 26-31 Aug 1990
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NEPTUNIUM HYDRIDES
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
PLUTONIUM HYDRIDES
DEUTERIUM COMPOUNDS
NEUTRON DIFFRACTION
ACTINIDE COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
ELECTRICAL PROPERTIES
HYDRIDES
HYDROGEN COMPOUNDS
NEPTUNIUM COMPOUNDS
PHYSICAL PROPERTIES
PLUTONIUM COMPOUNDS
SCATTERING
TRANSURANIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties