Vanadium and molybdenum disorder in M2.5VMoO8 (M = Mg, Mn, and Zn) determined with neutron powder diffraction and phase formation studies of Mg2.5+xV1+2xMo1-2xO8

Xiandong Wang, Jason D. Pless, Douglas A.Vander Griend, Peter C. Stair, Kenneth R. Poeppelmeier, Zhongbo Hu, James D. Jorgensen

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Disorder between the vanadium and molybdenum sites was investigated using neutron diffraction on polycrystalline samples of M2.5VMoO 8 (M=Mg2+, Mn2+, Zn2+) and the distribution of V5+ and Mo6+ among the tetrahedral sites was determined to be nearly statistical. The refined structures for all three polycrystalline samples corroborate those of corresponding single crystals determined previously with X-ray single crystal diffraction. Studies directed at the formation of Mg2.5+xV1+2xMo1-2xO 8 (x=0, ±0.02 and ±0.04) demonstrate that the phase begins to form at an appreciable rate at 1173K, which is approximately 250K below its melting point.

Original languageEnglish
Pages (from-to)87-94
Number of pages8
JournalJournal of Alloys and Compounds
Volume379
Issue number1-2
DOIs
Publication statusPublished - Oct 6 2004

Keywords

  • Cation vacancies
  • Molybdate
  • Neutron diffraction
  • Vanadate

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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