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RESEARCH PRODUCT
High-pressure structural transformations of PbCrO4 up to 51.2 GPa: An angle-dispersive synchrotron X-ray diffraction study
Ravhi S. KumarDaniel Errandoneasubject
DiffractionPhase transitionMaterials scienceMechanical EngineeringSynchrotron radiationCondensed Matter PhysicsCrystallographyTetragonal crystal systemMechanics of MaterialsMonazitePhase (matter)X-ray crystallographyGeneral Materials ScienceMonoclinic crystal systemdescription
Abstract We report on high-pressure X-ray diffraction measurements up to 51.2 GPa in PbCrO 4 at room temperature. Three high-pressure phases with structures different than the ambient-pressure monazite-type ( P 2 1 / n ) are reported. One phase transition was found at 3.8 GPa to an isomorphic structure to monazite. A second transition occurs at 11.1 GPa. After this transition, the coexistence of tetragonal ( I 4 1 / a ) and monoclinic ( P 2 1 ) structures is detected up to 21.1 GPa. Beyond this pressure and up to 51.2 GPa, only the high-pressure monoclinic phase is observed. Upon decompression all structural changes are reversible. Finally, the axial compressibilities for the different phases have been determined as well as the equations of state.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-12-01 | Materials Research Bulletin |