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

Xiandong Wang, Charlotte L. Stern, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

23 Citations (Scopus)

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
Pages (from-to)51-58
Number of pages8
JournalJournal of Alloys and Compounds
Volume243
Issue number1-2
Publication statusPublished - Oct 15 1996

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Cations
Crystal structure
Positive ions
Vanadium
Molybdenum
Differential thermal analysis
Oxides
Magnesium
X ray diffraction analysis
Solid solutions
Single crystals
Fluxes
Oxidation
Crystals
Air
Chemical analysis

Keywords

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

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Phase relations in the MgMoO4-Mg3V2O8 system and crystal structure of Mg2.54V1.08Mo0.92O8 1. / Wang, Xiandong; Stern, Charlotte L.; Poeppelmeier, Kenneth R.

In: Journal of Alloys and Compounds, Vol. 243, No. 1-2, 15.10.1996, p. 51-58.

Research output: Contribution to journalArticle

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N2 - 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.

AB - 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.

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