Synthesis, stoichiometry and structure of the quaternary scandium cuprate ba3Cu3Sc4O12 and of 334-phase solid solution members ba3Cu3Sc4-xInxO12 (0≤×≤4)

D. H. Gregory, P. R. Mawdsley, S. J. Barker, W. Daniell, D. P. Weston

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The quaternary scandium cuprate Ba3Cu3Sc4Ol2 has been prepared via the high temperature solid state reaction of the respective binary oxides and BaCO3 in air at 950 °C. The cuprate was characterised by powder X-ray diffraction (PXD) and its structure determined for the first time by Rietveld refinement of powder data. Crystallite morphology and metal stoichiometry were examined by SEM/EDAX. Oxygen stoichiometry and thermal behaviour were evaluated by TG/DTA and TPR. Ba3Cu3Sc4O12 crystallises with a tetragonal, perovskite-derived structure in space group I4/mcm (a= 11.9021(6) Å, c=8.3962(4) Å, V= 1189.41(10) Å3, Z=4, c/a = 0.71), isostructural with Ba3Cu3In4O12. Ba3Cu3Sc4O12 is paramagnetic at room temperature consistent with Cu(II). In readily substitutes for Sc to form Ba3Cu3Sc4-xInxO12 334-phases continuously to Ba3Cu3In4O12 (x=4). Structures of selected members have been determined from PXD data and correlated to the trivalent cation substituent level, x.

Original languageEnglish
Pages (from-to)806-814
Number of pages9
JournalJournal of Materials Chemistry
Volume11
Issue number3
DOIs
Publication statusPublished - Apr 2 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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