Pressure-induced structural phase transition in rare-earth trihydrides. Part III. Systematics: General and geometric approach

Systematics of hcp-fcc phase transition observed in a series of lanthanide and yttrium trihydrides has been established. Based on the established systematics the prediction of the hcp-fcc transition pressure for the rest of the lanthanide trihydrides has been made. The role of H-H repulsive interaction as a probable transition promoter is discussed. (C) 2006 Elsevier Ltd. All rights reserved.