Pressure-induced valence change in the rare earth metals:The case of Praseodymium

Naoyuki Tateiwa, Akitoshi Nakagawa, Kazuhiko Fujio +2

The rare earth metal praseodymium (Pr) transforms from the d-fcc crystal structure (Pr-III) to {$\alpha$}-U one (Pr-IV) at 20 GPa with a large volume collapse ($\mathrm{\Delta }V/V$ = 0.16), whi…