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Related Experiment Video

Updated: Apr 29, 2026

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
08:15

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups

Published on: February 11, 2012

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β-Nb9VO25.

Rawia Nasri1, Saïda Fatma Chérif1, Mohamed Faouzi Zid1

  • 1Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 El Manar Tunis, Tunisia.

Acta Crystallographica. Section E, Structure Reports Online
|May 27, 2014
PubMed
Summary

Nona-niobium vanadium penta-cosa-oxide, a novel material, was synthesized. Its unique 3D framework, built from niobium-oxygen octahedra and vanadium-oxygen tetrahedra, exhibits half-occupancy at the vanadium site.

Area of Science:

  • Solid-state chemistry
  • Inorganic materials science
  • Crystallography

Background:

  • Niobium-vanadium oxides are of interest due to their diverse structural and electronic properties.
  • Understanding the structural motifs and bonding in these complex oxides is crucial for materials design.

Purpose of the Study:

  • To synthesize and characterize a new nona-niobium vanadium penta-cosa-oxide compound.
  • To elucidate the crystal structure and bonding of the title compound.
  • To compare its structure with related known oxides.

Main Methods:

  • Solid-state reaction synthesis at 1198 K.
  • Single-crystal X-ray diffraction for structural determination.
  • Analysis of structural relationships with isotypic and related compounds.

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Niobium Oxide Films Deposited by Reactive Sputtering: Effect of Oxygen Flow Rate
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Main Results:

  • The compound was successfully prepared via solid-state reaction and found to be isotypic with Nb9AsO25, Nb9PO25, and Ta9VO25.
  • The crystal structure features a 3D framework constructed from corner- and edge-sharing NbO6 octahedra and VO4 tetrahedra.
  • The vanadium site exhibits half-occupancy, indicating that half of the VO4 tetrahedra are unoccupied.

Conclusions:

  • A new nona-niobium vanadium penta-cosa-oxide has been synthesized and its structure determined.
  • The compound possesses a complex 3D framework with unique structural features, including half-occupied vanadium sites.
  • Structural comparisons highlight differences and similarities with related niobium-vanadium and niobium-phosphate/arsenate oxides.