High-pressure synthesis of MnO-ZnO solid solutions with rock salt structure: in situ X-ray diffraction studies

TL;DR

This study used in situ synchrotron X-ray diffraction to investigate high-pressure synthesis of MnO-ZnO solid solutions with rock salt structure, revealing temperature-dependent lattice parameters and chemical reactions at 4.8 GPa.

Contribution

First in situ high-pressure study of MnO-ZnO system showing formation of rock salt solid solutions at elevated temperature and pressure.

Findings

Chemical reaction occurs above 750 K forming rock salt Mn1-xZnxO

Lattice parameters measured at high pressure and temperature

Thermal expansion coefficients calculated for solid solutions

Abstract

X-ray diffraction with synchrotron radiation has been used for the first time to study chemical interaction in the MnO-ZnO system at 4.8 GPa and temperatures up to 1600 K. Above 750 K, the chemical reaction between MnO and ZnO has been observed that resulted in the formation of rock salt (rs) Mn1-xZnxO solid solutions (0.3 \leq x \leq 0.7). The lattice parameters of these solid solutions have been in situ measured at high pressure as a function of temperature, and corresponding thermal expansion coefficients have been calculated.