Premium
The phase transition in α‐U 3 O 8 at 210°C
Author(s) -
Loopstra B. O.
Publication year - 1970
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s002188987000571x
Subject(s) - neutron diffraction , phase transition , space group , space (punctuation) , group (periodic table) , crystallography , diffraction , transition temperature , order (exchange) , materials science , condensed matter physics , chemistry , x ray crystallography , physics , crystal structure , optics , organic chemistry , linguistics , philosophy , superconductivity , finance , economics
The structure of α‐U 3 O 8 above the transition point at 210°C has been determined from neutron powder diffraction data. It was found to be very similar to the structure at room temperature. Contrary to experimental evidence, theory does not allow a second order phase transition from the structure at high temperature (space group P 2 m ) to that at room temperature (space group C 2 mm ).