1972•Mineralogical JournalOpen access

SYNTHESES OF MONOCLINIC AND TETRAGONAL ZrO2 AT HIGH TEMPERATURES

Akira Ono

Abstract

Single crystals of ZrO2 in tetragonal crystal forms were synthesized by flux methods. The tetragonal crystal was transformed into a single or twinned monoclinic phase during cooling. The observed orientational relations between the two phases is ct//cm, and {100}m//{100}t. Three kinds of orientational relations were observed on heating transformation; ct is parallel to cm, bm, and am*. The equilibrium temperature of the monoclinic and the tetragonal phases is 1, 145±10°C.

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Key concepts: Monoclinic crystal system, Tetragonal crystal system, Crystallography, Phase (matter), Materials science, Crystal (programming language), Single crystal, Crystal structure