Structure of Mg2.56V1.12W0.88O8 and vibrational raman spectra of Mg2.5VWO8 and Mg 2.5VMoO8

Jason D. Pless, Hack Sung Kim, Jared P. Smit, Xiandong Wang, Peter C. Stair, Kenneth R. Poeppelmeier

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Abstract

Mg2.56V1.12W0.88O8 crystals were grown from a MgO/V2O5/WO3 melt. X-ray single-crystal diffraction studies revealed that it is orthorhombic with space group Pnma, a = 5.0658(5) Å, b = 10.333(1) Å, c = 17.421(2) Å, Z = 6, and is isostructural with Mg2.5VMoO8. Raman spectra are reported, and the assignment of the Raman bands is made by comparing the metal-oxygen vibrations of VO4/WO4 tetrahedra in Mg2.5VWOe with the metal-oxygen vibrations of VO4/MoO 4 tetrahedra in Mg2.5VMoO8. The stretching vibrations appearing at 1016 and 1035 cm-1 are assigned to Mo=O and W=O double bonds, respectively, associated with the Mg2+ cation vacancies.

Original languageEnglish
Pages (from-to)514-520
Number of pages7
JournalInorganic Chemistry
Volume45
Issue number2
DOIs
Publication statusPublished - Jan 23 2006

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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