Electron diffraction evidence for continuously variable, composition-dependent O/F ordering in the ReO3 type, Nb 1-xVNbxIVO2-xF 1+x, 0≤x≤0.48, solid solution

Frank J. Brink, Lasse Norén, Ray L. Withers*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    A spread of compositions within the NbV1-xNb IVxO2-xF1+x solid solution have been successfully synthesized in the range 0≤x≤0.48. In each case electron diffraction has revealed the presence of strong planar diffuse scattering perpendicular to each of the three 〈001〉 directions at the G±〈hkq〉* regions of reciprocal space, where G represents a Bragg reflection of the ReO3 type average structure, h and k are continuously variable and q is a fixed (at any one particular composition), composition-dependent parameter in the range from 1/3 to 1/2. Careful electron probe microanalysis indicates that the value of q is directly related to composition via the equation q=(x+1)/3 and hence acts as a "chemical ruler" for the composition. A plausible model for the implied one-dimensional O/F ordering as well as for the observed shift in the position of the diffuse versus composition is provided via a crenel type occupational atomic modulation function.

    Original languageEnglish
    Pages (from-to)2177-2182
    Number of pages6
    JournalJournal of Solid State Chemistry
    Volume177
    Issue number6
    DOIs
    Publication statusPublished - Jun 2004

    Fingerprint

    Dive into the research topics of 'Electron diffraction evidence for continuously variable, composition-dependent O/F ordering in the ReO3 type, Nb 1-xVNbxIVO2-xF 1+x, 0≤x≤0.48, solid solution'. Together they form a unique fingerprint.

    Cite this