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Single-Crystal Neutron Diffraction Investigations on the Phase Transitions in CeO1.800 and CeO1.765

✍ Scribed by E.A. Kümmerle; F. Güthoff; W. Schweika; G. Heger

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
952 KB
Volume
153
Category
Article
ISSN
0022-4596

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✦ Synopsis

Information on the controversial phase diagram of CeO y (1.65(y42.0) was obtained by making single-crystal neutron scattering measurements on CeO 1.800 and CeO 1.765 up to 1064 K. The observed phase transitions at 755 K, 823 K, 866 K, and 898 K when the temperature is raised (or 738 K, 773 K, 845 K, and 898 K when T is lowered) for CeO 1.800 as well as the observed phase transition at 911 K (907 K) for CeO 1.765 qualitatively con-5rm the phase diagram proposed previously by Ricken et al. The crystal structures of all the observed phases apparently are of rhombohedral symmetry (space group R3 ).

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