Thermal decomposition of crystalline Ni-II-Cr-III layered double hydroxide: A structural study of the segregation process

dc.contributorUniv Buenos Aires
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorComis Nacl Energia Atom
dc.date.accessioned2014-05-20T15:21:39Z
dc.date.available2014-05-20T15:21:39Z
dc.date.created2014-05-20T15:21:39Z
dc.date.issued2005-05-26
dc.identifierJournal of Physical Chemistry B. Washington: Amer Chemical Soc, v. 109, n. 20, p. 10137-10141, 2005.
dc.identifier1520-6106
dc.identifierhttp://hdl.handle.net/11449/32769
dc.identifier10.1021/jp050639v
dc.identifierWOS:000229296600039
dc.description.abstractA structural study of the thermal evolution of Ni0.69Cr0.31(OH)(2)(CO3)(0.155)(.)nH(2)O into NiO and tetragonal NiCr2O4 is reported. The characteristic structural parameters of the two coexisting crystalline phases, as well as their relative abundance, were determined by Rietveld refinement of powder x-ray diffraction (PXRD) patterns. The results of the simulations allowed us to elucidate the mechanism of the demixing process of the oxides. It is demonstrated that nucleation of a metastable nickel chromite within the common oxygen framework of the parent Cr-III-doped bunsenite is the initial step of the cationic redistribution. The role that trivalent cations play in the segregation of crystalline spinels is also discussed.
dc.languageeng
dc.publisherAmer Chemical Soc
dc.relationJournal of Physical Chemistry B
dc.relation3.146
dc.relation1,331
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.titleThermal decomposition of crystalline Ni-II-Cr-III layered double hydroxide: A structural study of the segregation process
dc.typeArtículos de revistas


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