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

Xiandong Wang; Charlotte L. Stern; Kenneth R Poeppelmeier

Phase relations in the MgMoO₄-Mg₃V₂O₈ system and crystal structure of Mg_2.54V_1.08Mo_0.92O₈ 1

Xiandong Wang, Charlotte L. Stern, Kenneth R Poeppelmeier

Northwestern University

Research output: Contribution to journal › Article

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 Mg_2.5VMoO₈ was found to exhibit a considerable solid solution Mg_2.5+xV_1+2xMo_1-2xO₈ (-0.05 ≤ * ≤ 0.05) at 1100 °C in air. Single crystals with composition of Mg_2.54V_1.08Mo_0.92O₈ were successfully grown from the Mg-V-Mo-Oxide flux. Mg_2.54V_1.08Mo_0.92O₈ 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 language	English
Pages (from-to)	51-58
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	243
Issue number	1-2
Publication status	Published - Oct 15 1996

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Keywords

Crystal structure
MgVMoO and MgMoO-MgVO system
Phase diagram

ASJC Scopus subject areas

Metals and Alloys

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Wang, X., Stern, C. L., & Poeppelmeier, K. R. (1996). Phase relations in the MgMoO₄-Mg₃V₂O₈ system and crystal structure of Mg_2.54V_1.08Mo_0.92O₈ 1. Journal of Alloys and Compounds, 243(1-2), 51-58.

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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) {\AA}, b = 10.307(3) {\AA}, c = 17.402(4) {\AA}, 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.",

keywords = "Crystal structure, MgVMoO and MgMoO-MgVO system, Phase diagram",

author = "Xiandong Wang and Stern, {Charlotte L.} and Poeppelmeier, {Kenneth R}",

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AU - Wang, Xiandong

AU - Stern, Charlotte L.

AU - Poeppelmeier, Kenneth R

PY - 1996/10/15

Y1 - 1996/10/15

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.

KW - Crystal structure

KW - MgVMoO and MgMoO-MgVO system

KW - Phase diagram

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