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

Research output: Contribution to journalArticle

12 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)87-94
Number of pages8
JournalJournal of Alloys and Compounds
Volume379
Issue number1-2
DOIs
Publication statusPublished - Oct 6 2004

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Vanadium
Neutron powder diffraction
Molybdenum
Single crystals
Neutron diffraction
Melting point
Diffraction
X rays

Keywords

  • Cation vacancies
  • Molybdate
  • Neutron diffraction
  • Vanadate

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

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. / 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 journalArticle

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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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T1 - 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

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.

PY - 2004/10/6

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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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