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RESEARCH PRODUCT
Structural study of α-Bi2O3 under pressure
Lourdes GraciaCatalin PopescuA. L. J. PereiraB. García-domeneFrancisco Javier ManjónJuan Angel SansDaniel ErrandoneaAlfonso MuñozA. Miquel-veyratOscar GomisA. Beltránsubject
DiffractionTransformationsPhase transitionTheoretical studyMaterials scienceOxideFOS: Physical scienceschemistry.chemical_elementThermodynamicsTheoretical calculationsPhase-transitionsCrystal structureElectrolyteBismuth oxideConductivityBismuthInduced amorphizationElectrolyteschemistry.chemical_compoundPowder samplesGeneral Materials ScienceDeviatoric stressX-ray diffraction measurementsConductivityCondensed Matter - Materials ScienceCrystal-structuresCompressibilityAmorphous phaseMaterials Science (cond-mat.mtrl-sci)In-situCondensed Matter PhysicsStructural studieschemistryFISICA APLICADAPressure-induced amorphizationStateMonoclinic crystal systemdescription
An experimental and theoretical study of the structural properties of monoclinic bismuth oxide (alpha-(BiO3)-O-2) under high pressures is here reported. Both synthetic and mineral bismite powder samples have been compressed up to 45 GPa and their equations of state have been determined with angle-dispersive x-ray diffraction measurements. Experimental results have been also compared with theoretical calculations which suggest the possibility of several phase transitions below 10 GPa. However, experiments reveal only a pressure-induced amorphization between 15 and 25 GPa, depending on sample quality and deviatoric stresses. The amorphous phase has been followed up to 45 GPa and its nature discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 |