Abstract
Heavy rare earth metal terbium has been studied at synchrotron sources using both angular and energy dispersive x-ray diffraction to a maximum pressure of (volume fraction ). The complete regular trivalent rare earth structural sequence, fcc , is observed at low pressures except for the undistorted fcc. At , terbium undergoes a 5% volume collapse transitioning to monoclinic. The open, low symmetry structure is reminiscent of the delocalization phenomenon in the light rare earth metals, particularly the phase of cerium.
- Received 11 July 2007
DOI:https://doi.org/10.1103/PhysRevB.76.212101
©2007 American Physical Society