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

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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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",

author = "Xiandong Wang and Pless, {Jason D.} and Griend, {Douglas A.Vander} and Stair, {Peter C.} and Poeppelmeier, {Kenneth R.} and Zhongbo Hu and Jorgensen, {James D.}",

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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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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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