La3Cu2VO9: A surprising variation on the YA1O3 structure-type with 2D copper clusters of embedded triangles

Douglas A. Vander Griend, Sylvie Malo, Scott J. Barry, Noura M. Dabbousch, Kenneth R Poeppelmeier, Vinayak P. Dravid

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

La3Cu2VO9 crystallizes in a heretofore unknown superstructural variation of the rare-earth hexagonal structure (P63/mmc) for ABO3 stoichiometries as characterized by X-ray, neutron and electron diffraction. The alternating hexagonal layers of LaO6/3 and (Cu/V)O3/3 resemble those of YA1O3, except that the copper and vanadium order to create an a√13 × a√13 × c supercell with P63/m symmetry. The B-cation coordination environments accommodate copper and vanadium in a two to one molar ratio. The CuII lattice consists of nine atom clusters of triangles in triangles similar to a kagomé lattice. The phase is paramagnetic from 5 to 370 K with three temperature regimes that correspond closely to 1/9, 4/9, and 9/9 spins per copper.

Original languageEnglish
Pages (from-to)569-579
Number of pages11
JournalSolid State Sciences
Volume3
Issue number5
DOIs
Publication statusPublished - 2001

Keywords

  • Copper clusters
  • Hexagonal structure
  • Kagomé
  • LaCuVO

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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