High-pressure synthesis of rock salt LiMeO2-ZnO (Me = Fe3+, Ti3+) solid solutions

TL;DR

This study reports the high-pressure synthesis of metastable rock salt LiMeO2-ZnO solid solutions with detailed analysis of their structure, stability, and thermal properties, expanding the understanding of phase stability under extreme conditions.

Contribution

It introduces a novel high-pressure synthesis method for metastable LiMeO2-ZnO solid solutions with rock salt structure and characterizes their properties.

Findings

Rock salt LiMeO2-ZnO solutions synthesized at 7.7 GPa and 1350-1450 K.

Kinetic stability of these solutions up to 670-800 K at ambient pressure.

Detailed structural and thermal analysis using synchrotron X-ray diffraction.

Abstract

Metastable LiMeO2-ZnO (Me = Fe3+, Ti3+) solid solutions with rock salt crystal structure have been synthesized by solid state reaction of ZnO with LiMeO2 complex oxides at 7.7 GPa and 1350-1450 K. Structure, phase composition, thermal stability and thermal expansion of the recovered samples have been studied by X-ray diffraction with synchrotron radiation. At ambient pressure rock salt LiMeO2-ZnO solid solutions are kinetically stable up to 670-800 K depending on the composition.