An Investigation of the Pressure-Induced Structural Phase Transition of Nanocrystalline α-CuMoO4

The structural behavior of nanocrystalline α-CuMoO4 was studied at ambient temperature up to 2 GPa using in situ synchrotron X-ray powder diffraction. We found that undergoes a phase transition into γ-CuMoO4 0.5 GPa. sequence is analogous the its bulk counterpart, but pressure doubled. A coexistence both phases observed till 1.2 gives rise change copper coordination from square-pyramidal octahedral coordination. involves volume reduction 13% indicating first-order nature transition. This transformation be irreversible nature. dependence unit-cell parameters obtained and discussed, compressibility analyzed.