Studies of selected transuranium and lanthanide triiodides under pressure using absorption spectrophotometry

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:6809388

Haire, R G; Young, J P; Peterson, J R; Benedict, U

The anhydrous triiodides of plutonium, americium, and curium under pressure have been investigated using absorption spectrophotometry. These initial studies on plutonium and curium triiodides together with the published data for americium triiodide show that the rhombohedral (BiI/sub 3/-type structure) form of these compounds can be converted to the same orthorhombic (PuBr/sub 3/-type structure) form by applying pressure at room temperature. Absorption spectrophotometry can often differentiate between two crystallographic forms of materials and has been used in the present high pressure studies to monitor the effects of pressure on the triiodides. A complication in these studies of the triiodides is a significant shift of their absorption edges from the near uv to the visible spectral region with pressure. With curium triiodide this shift causes interference with the major f-f absorption peaks and precludes identification by absorption spectrophotometry of the high pressure phase of CmI/sub 3/. 21 refs., 2 figs.

• Research Organization: Oak Ridge National Lab., TN (USA); Tennessee Univ., Knoxville (USA). Dept. of Chemistry; Commission of the European Communities, Karlsruhe (Germany, F.R.). European Inst. for Transuranium Elements
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6809388
• Report Number(s): CONF-860911-25; ON: DE87004402
• Resource Relation: Conference: 192. American Chemical Society national meeting, Anaheim, CA, USA, 7 Sep 1986; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMERICIUM IODIDES
ABSORPTION SPECTROSCOPY
CURIUM COMPOUNDS
IODINE COMPOUNDS
PLUTONIUM IODIDES
CRYSTAL LATTICES
GADOLINIUM IODIDES
LANTHANUM IODIDES
MOLECULAR STRUCTURE
PRESSURE EFFECTS
X-RAY DIFFRACTION
ACTINIDE COMPOUNDS
AMERICIUM COMPOUNDS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
GADOLINIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IODIDES
LANTHANUM COMPOUNDS
PLUTONIUM COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
SPECTROSCOPY
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPOUNDS
400102* - Chemical & Spectral Procedures