6533b834fe1ef96bd129cd25
RESEARCH PRODUCT
An Investigation of the Pressure-Induced Structural Phase Transition of Nanocrystalline alpha-CuMoO4
Vinod PanchalCatalin PopescuDaniel Errandoneasubject
Inorganic ChemistryCondensed Matter::Materials Sciencehigh pressure; phase transition; synchrotron radiation; X-ray diffractionGeneral Chemical EngineeringFísicaGeneral Materials ScienceCondensed Matter PhysicsMaterialsdescription
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 nanocrystalline α-CuMoO4 undergoes a structural phase transition into γ-CuMoO4 at 0.5 GPa. The structural sequence is analogous to the behavior of its bulk counterpart, but the transition pressure is doubled. A coexistence of both phases was observed till 1.2 GPa. The phase transition gives rise to a change in the copper coordination from square-pyramidal to octahedral coordination. The transition involves a volume reduction of 13% indicating a first-order nature of the phase transition. This transformation was observed to be irreversible in nature. The pressure dependence of the unit-cell parameters was obtained and is discussed, and the compressibility analyzed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-03-09 |