Title: Pressure impact on the stability and distortion of the crystal structure of CeScO3,
Abstract: The effects of high pressure on the crystal structure of orthorhombic (Pnma)
perovskite type cerium scandate have been studied in situ under high pressure
by means of synchrotron x-ray powder diffraction, using a diamond anvil cell.
We have found that the perovskite type crystal structure remains stable up to
40 GPa, the highest pressure reached in the experiments. The evolution of
unit-cell parameters with pressure has indicated an anisotropic compression.
The room-temperature pressure-volume equation of state is obtained from the
experiments. From the evolution of microscopic structural parameters like bond
distances and coordination polyhedra of cerium and scandium, the macroscopic
behavior of CeScO3 under compression has been explained and reasoned for its
large pressure stability. The reported results are discussed in comparison with
high-pressure results from other perovskites.