STUDIES OF SELECTED TRANSURANIUM AND LANTHANIDE TRI-IODIDES UNDER PRESSURE USING ABSORPTION SPECTROPHOTOMETRY
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"3"-type structure) form of these compounds can be converted to the same orthorhombic (PuBr"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"3".
Bibliographic Reference: 192ND AMERICAN CHEMICAL SOCIETY MEETING, ANAHEIM, CA., USA, SEPT. 7-12, 1986, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 33254 E
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Record Number: 1989126060400 / Last updated on: 1989-05-01
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