A combined time-of-flight powder neutron and powder X-ray diffraction study of ternary chromium sulfides, VxCr3-xS4 (0≤x≤1.0)

Douglas C. Colgan, Anthony Vivian Powell

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22 Citations (Scopus)

Abstract

A combination of time-of-flight powder neutron diffraction and powder X-ray diffraction has been used to investigate the distribution of vanadium and chromium cations between two crystallographic sites in the series of ternary sulfides VxCr3-xS4 (0.0=x=1.0). These materials adopt the Cr3S4 structure (space group I2/m: a˜5.9, b˜3.4, c˜1.2 Å; ߘ91.4°) over the entire composition range. However, a marked change in the distribution of cations takes place in a region of composition in which anomalies have previously been observed in plots of cell parameters as a function of composition. Above x˜0.4, vanadium is almost equally apportioned between sites in a fully occupied cation layer and sites in an ordered vacancy layer, whereas at a composition V0.2Cr2.8S4, vanadium preferentially occupies sites in the ordered vacancy layer.

Original languageEnglish
Pages (from-to)1579-1584
Number of pages6
JournalJournal of Materials Chemistry
Volume6
Issue number9
Publication statusPublished - 1996

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