Synthesis and crystal structure determination of LaAuO3

Martina Ralle, Martin Jansen

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

A new ternary oxide of gold and lanthanum, LaAuO3, has been prepared from Au2O3 · 2H2O and La(OH)3 by applying high oxygen pressure and adding aqueous KOH (55%) as a mineralizer. The bright yellow and diamagnetic LaAuO3 crystallizes in the orthorhombic crystal system, Pbcm, a = 403.35(7), b = 1307.3(2), c = 569.52(8) pm, Z = 4. The crystal structure (determined from 980 unique reflections with a final R value of 5.7% (Rw = 4.7%)) consists of a grid of cubes formed by the oxygens which are either centered by lanthanum ions or face centered by gold ions. Thus, lanthanum is coordinated eightfold, and gold fourfold, by oxygen. LaAuO3 may be described as a CaF2 structure sheared within the (110) plane by half a translational period along (0 0 1].

Original languageEnglish (US)
Pages (from-to)378-384
Number of pages7
JournalJournal of Solid State Chemistry
Volume105
Issue number2
DOIs
StatePublished - Aug 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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