Radiation- and thermally-induced transformations of crystalline cerium(IV) phosphate CePE

The transformations caused by irradiation and thermal treatments of crystalline cerium(IV) phosphate CeP-E [Ce(NH 4PO 4) 0.44(HPO 4) 1.56], which has a high ion exchange capacity, have been studied by electron microscopy, infrared spectroscopy, and X-ray powder diffraction. Electron bombardment in t...

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Veröffentlicht in:	Mater. Res. Bull.; (United States) 1984-07, Vol.19 (7), p.905-914
Hauptverfasser:	Herman, Richard G., Dominguez, J.Manuel
Format:	Artikel
Sprache:	eng
Schlagworte:	360602 - Other Materials- Structure & Phase Studies 400600 - Radiation Chemistry ACTINIDE COMPOUNDS AMMONIUM COMPOUNDS AMMONIUM PHOSPHATES AMORPHOUS STATE CERIUM COMPLEXES COHERENT SCATTERING COMPLEXES Condensed matter: structure, mechanical and thermal properties CRYSTALS DIFFRACTION DIMENSIONS ELECTRON MICROSCOPY Exact sciences and technology GLASS HEAT TREATMENTS HYDROGEN COMPOUNDS INFRARED SPECTRA INORGANIC ACIDS ION EXCHANGE IRRADIATION MATERIALS MATERIALS SCIENCE MICROSCOPY MINERALS MONAZITES OXYGEN COMPOUNDS PHASE TRANSFORMATIONS PHOSPHATES PHOSPHORIC ACID PHOSPHORUS COMPOUNDS Physical radiation effects, radiation damage Physics PRODUCTION RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY RADIATION EFFECTS RADIOACTIVE MATERIALS RADIOACTIVE MINERALS RARE EARTH COMPLEXES RARE EARTH COMPOUNDS SCATTERING SPECTRA Structure of solids and liquids crystallography THICKNESS THORIUM COMPOUNDS THORIUM MINERALS THORIUM PHOSPHATES X-RAY DIFFRACTION
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Zusammenfassung:	The transformations caused by irradiation and thermal treatments of crystalline cerium(IV) phosphate CeP-E [Ce(NH 4PO 4) 0.44(HPO 4) 1.56], which has a high ion exchange capacity, have been studied by electron microscopy, infrared spectroscopy, and X-ray powder diffraction. Electron bombardment in the electron microscope transformed CeP-E into either hexagonal CePO 4 or a vitreous glass (dependent on sample thickness), while irradiation of CeP-E with X-rays produced an amorphous material. All of these materials were transformed into highly stable crystalline monoclinic CePO 4 (monazite) by thermal treatments.
ISSN:	0025-5408 1873-4227
DOI:	10.1016/0025-5408(84)90053-9