14890-42-7Relevant articles and documents
Crystal structures of the trifluorides, trichlorides, tribromides, and triiodides of americium and curium
Asprey,Keenan,Kruse
, p. 985 - 986 (1965)
The previously unreported lattice constants and crystal symmetries of the trifluoride, trichloride, tribromide, and triiodide of curium are given. Similar data for the isostructural trihalides of americium (except for the trifluoride) have been redetermined to a higher degree of precision. Correlations have been made between these actinide trihalides and the corresponding lanthanide trihalides. Curium trifluoride is hexagonal, LaF3-type, space group P63/mmc-D6h4. Americium and curium trichlorides are hexagonal, UCl3-type, space group P63/m-C6h2. The tribromides are orthorhombic, PuBr3-type, space group Cmcm-D2h17. The triiodides are hexagonal, BiI3-type, space group R3-C3i2. When treated with hydrogen at elevated temperatures, no reduction of these trivalent americium or curium trihalides was observed.
Raman spectra of selected transuranium trihalides in the solid state
Wilmarth, W. R.,Begun, G. M.,Haire, R. G.,Peterson, J. R.
, p. 4666 - 4670 (2007/10/02)
Raman spectral data have been obtained from a number of transuranium trihalides in the solid state.The Raman spectra of these actinide compounds are reported and compared to the published Raman spectra of isostructural compounds.Tentative symmetry assignments have been made for the observed Raman-active lattice vibrations based on nuclear site symmetry analysis of their respective crystal structures and comparisons to the symmetry assignments made for isostructural lanthanide compounds.The Raman spectral data obtained in this study represent a partial data base for the use of Raman spectroscopy for identifying the crystal structures exhibited by these and isostructural compounds.
