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

doi:10.1016/j.jallcom.2004.02.015

Vanadium and molybdenum disorder in M_2.5VMoO₈ (M = Mg, Mn, and Zn) determined with neutron powder diffraction and phase formation studies of Mg_2.5+xV_1+2xMo_1-2xO₈

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

Northwestern University

Research output: Contribution to journal › Article

13 Citations (Scopus)

Abstract

Disorder between the vanadium and molybdenum sites was investigated using neutron diffraction on polycrystalline samples of M_2.5VMoO 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 Mg_2.5+xV_1+2xMo_1-2xO 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 language	English
Pages (from-to)	87-94
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	379
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2004.02.015
Publication status	Published - Oct 6 2004

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Keywords

Cation vacancies
Molybdate
Neutron diffraction
Vanadate

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Cite this

Wang, X., Pless, J. D., Griend, D. A. V., Stair, P. C., Poeppelmeier, K. R., Hu, Z., & Jorgensen, J. D. (2004). Vanadium and molybdenum disorder in M_2.5VMoO₈ (M = Mg, Mn, and Zn) determined with neutron powder diffraction and phase formation studies of Mg_2.5+xV_1+2xMo_1-2xO₈. Journal of Alloys and Compounds, 379(1-2), 87-94. https://doi.org/10.1016/j.jallcom.2004.02.015

Vanadium and molybdenum disorder in M_2.5VMoO₈ (M = Mg, Mn, and Zn) determined with neutron powder diffraction and phase formation studies of Mg_2.5+xV_1+2xMo_1-2xO₈. / Wang, Xiandong; Pless, Jason D.; Griend, Douglas A.Vander; Stair, Peter C.; Poeppelmeier, Kenneth R.; Hu, Zhongbo; Jorgensen, James D.

In: Journal of Alloys and Compounds, Vol. 379, No. 1-2, 06.10.2004, p. 87-94.

Research output: Contribution to journal › Article

Wang, Xiandong ; Pless, Jason D. ; Griend, Douglas A.Vander ; Stair, Peter C. ; Poeppelmeier, Kenneth R. ; Hu, Zhongbo ; Jorgensen, James D. / Vanadium and molybdenum disorder in M_2.5VMoO₈ (M = Mg, Mn, and Zn) determined with neutron powder diffraction and phase formation studies of Mg_2.5+xV_1+2xMo_1-2xO₈. In: Journal of Alloys and Compounds. 2004 ; Vol. 379, No. 1-2. pp. 87-94.

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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.",

keywords = "Cation vacancies, Molybdate, Neutron diffraction, Vanadate",

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AU - Wang, Xiandong

AU - Pless, Jason D.

AU - Griend, Douglas A.Vander

AU - Stair, Peter C.

AU - Poeppelmeier, Kenneth R.

AU - Hu, Zhongbo

AU - Jorgensen, James D.

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N2 - 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.

AB - 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.

KW - Cation vacancies

KW - Molybdate

KW - Neutron diffraction

KW - Vanadate

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10.1016/j.jallcom.2004.02.015