Pressure-induced structural transitions in actinides and lanthanides : Considerations on recent work
High-pressure structural investigation of f-metals has recently been extended by the study of selected f-elements at higher pressures than before, in some cases above 100 GPa, and by study of binary alloys between f-elements that are neighbours in the Periodic Table. In addition, promethium has undergone high-pressure X-ray diffraction study, as has a Pm-Sm alloy. These recent results are briefly reported and included in updated versions of the two general diagrams. Actinide compounds have been under structural study at high pressure for the last 12 years. Emphasis has been on the largest family of 1:1 compounds, ie. the B1 type compounds, which allow systematic comparison and have been found to exhibit a number of interesting physical properties such as ferro- and antiferro-magnetism. In the corresponding lanthanide compounds, only those with divalent cations have been studied under pressure because pressure-induced valence changes (electronic transitions) were expected. While a considerable number of B1 type compounds of Th, U, Np and Pu have been investigated under pressure, for heavier actinides only a few results are available up to now. This paper considers recent work in this field.
Bibliographic Reference: Paper presented: 22. Journées des Actinides, Méribel (FR), April 22-24, 1992
Availability: Text not available
Record Number: 199210809 / Last updated on: 1994-12-02
Original language: en
Available languages: en