CHANGEMENTS DE PHASES ET MICROSTRUCTURES
J. Phys. IV France 04 (1994) C3-163-C3-167
Packing of ovaloïd atoms in actinide structuresV. DMITRIEV, B. METTOUT and P. TOLEDANO
Laboratoire des Transitions de Phases, 33 rue Saint-Leu, 80000 Amiens, France
The atomistic mechanisms which result in the structures of eleven actinide elements are deduced from a parent bcc structure. The rich polymorphism and idiosyncratic structures found in uranium, neptunium and plutonium are interpreted in terms of close packings of ovaloïd atoms. The incommensurate structure found in α-U is discussed in this framework.
© EDP Sciences 1994