Abstract

The Rietveld refinements of crystal structure were undertaken on powder samples of ZrO2 and HfO2 quenched from 600°C⋅6GPa. The results on orthorhombic ZrO2 were consistent with those of a single crystal obtained under pressure. The compressibility of this phase was calculated as 4.65×10-3GPa-1. The results on HfO2 were also conformable to those on ZrO2.

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