Phase relations in the MgMoO4-Mg3V2O8 system and crystal structure of Mg2.54V1.08Mo0.92O8 1

Xiandong Wang, Charlotte L. Stern, Kenneth R. Poeppelmeier*

*Corresponding author for this work

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

The phase relationships in the pseudobinary MgMoO4-Mg3V2O8 system have been determined by differential thermal analysis and X-ray diffraction analysis. The intermediate compound Mg2.5VMoO8 was found to exhibit a considerable solid solution Mg2.5+xV1+2xMo1-2xO8 (-0.05 ≤ * ≤ 0.05) at 1100 °C in air. Single crystals with composition of Mg2.54V1.08Mo0.92O8 were successfully grown from the Mg-V-Mo-Oxide flux. Mg2.54V1.08Mo0.92O8 crystallizes in the orthorhombic system, space group Pnma with a = 5.058(1) Å, b = 10.307(3) Å, c = 17.402(4) Å, Z = 6. The vanadium and molybdenum cations remain in their highest oxidation states and charge neutrality associated with the variation of the V/Mo atomic ratio is balanced by an increase or decrease in the number of magnesium cations in the crystal.

Original languageEnglish (US)
Pages (from-to)51-58
Number of pages8
JournalJournal of Alloys and Compounds
Volume243
Issue number1-2
DOIs
StatePublished - Oct 15 1996

Keywords

  • Crystal structure
  • MgVMoO and MgMoO-MgVO system
  • Phase diagram

ASJC Scopus subject areas

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

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