6533b7dcfe1ef96bd1272005

RESEARCH PRODUCT

In situ high-pressure synchrotron X-ray diffraction study of the structural stability in NdVO4 and LaVO4

Daniel ErrandoneaCatalin PopescuMarco BettinelliA. K. TyagiSrungarpu N. Achary

subject

DiffractionCeramicsPhase transitionMaterials scienceHigh-pressureMechanical EngineeringAnalytical chemistryCrystal structureCondensed Matter PhysicsX-ray diffractionCrystallographyVolume (thermodynamics)Mechanics of MaterialsStructural stabilityvisual_artX-ray crystallographyvisual_art.visual_art_mediumCompressibilityGeneral Materials ScienceCeramicCeramics; High-pressure; X-ray diffraction

description

Abstract Room-temperature angle-dispersive X-ray diffraction measurements on zircon-type NdVO 4 and monazite-type LaVO 4 were performed in a diamond-anvil cell up to 12 GPa. In NdVO 4 , we found evidence for a non-reversible pressure-induced structural phase transition from zircon to a monazite-type structure at 6.5 GPa. Monazite-type LaVO 4 also exhibits a phase transition but at 8.6 GPa. In this case the transition is reversible and isomorphic. In both compounds the pressure induced transitions involve a large volume collapse. Finally, the equations of state and axial compressibilities for the low-pressure phases are also determined.

yearjournalcountryeditionlanguage
2014-02-01Materials Research Bulletin
https://doi.org/10.1016/j.materresbull.2013.10.047