6533b821fe1ef96bd127c3b7
RESEARCH PRODUCT
High-pressure powder x-ray diffraction study of EuVO4
Daniel ErrandoneaAlka B. Gargsubject
DiffractionChemical Physics (physics.chem-ph)Phase transitionCondensed Matter - Materials ScienceChemistrychemistry.chemical_elementMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesCrystal structureCondensed Matter PhysicsFergusoniteSynchrotronElectronic Optical and Magnetic Materialslaw.inventionInorganic ChemistryCrystallographylawPhysics - Chemical PhysicsX-ray crystallographyMaterials ChemistryCeramics and CompositesPhysical and Theoretical ChemistryEuropiumPowder diffractiondescription
The high-pressure structural behavior of europium orthovanadate has been studied using in-situ, synchrotron based, high-pressure x-ray powder diffraction technique. Angle-dispersive x-ray diffraction measurements were carried out at room temperature up to 34.7 GPa using a diamond-anvil cell, extending the pressure range reported in previous experiments. We confirmed the occurrence of zircon-scheelite phase transition at 6.8 GPa and the coexistence of low- and high-pressure phases up to 10.1 GPa. In addition, clear evidence of a scheelite-fregusonite transition is found at 23.4 GPa. The fergusonite structure remains stable up to 34.7 GPa, the highest pressure reached in the present measurements. A partial decomposition of EuVO4 was also observed from 8.1 to 12.8 GPa, however, this fact did not preclude the identification of the different crystal structures of EuVO4. The crystal structures of the different phases have been Rietveld refined and their equations of state (EOS) have been determined. The results are compared with the previous experimental data and theoretical calculations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-03-01 |