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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
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K(1.65)V(1.78)W(0.22)O(2)(AsO(4))(2).

Sabrina Belkhiri1, Mohammed Kars, Djillali Mezaoui

  • 1Université Houari-Boumedienne, Faculté de Chimie, Laboratoire Sciences des Matériaux USTHB, BP 32 El-Alia, 16111 Bab-Ezzouar, Alger, Algérie.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

A novel potassium vanadium tungsten bis-(arsenate oxide) material was synthesized. Its crystal structure features infinite chains and statistically occupied metal sites, offering insights into complex oxide frameworks.

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Area of Science:

  • Solid-state chemistry
  • Inorganic materials science
  • Crystallography

Background:

  • Understanding the synthesis and structural properties of mixed metal oxides is crucial for developing new functional materials.
  • Vanadium and tungsten oxides, along with arsenates, form complex structures with potential applications.

Purpose of the Study:

  • To synthesize and characterize a new potassium vanadium tungsten bis-(arsenate oxide) compound.
  • To elucidate the crystal structure and bonding of the synthesized material.

Main Methods:

  • Solid-state reaction at 973 K.
  • X-ray diffraction for crystal structure determination.
  • Analysis of atomic positions and site occupancies.

Main Results:

  • The compound K(V,W)As2O8 was successfully synthesized.
  • The crystal structure is isotypic with KVOPO4, featuring a [MVAs2O10]∞ framework.
  • Infinite [VAsO8]∞ and [MAsO8]∞ chains were identified.
  • The metal site M is statistically occupied by 78% vanadium and 22% tungsten.

Conclusions:

  • The study reports a new mixed-metal arsenate oxide with a unique framework structure.
  • The statistical distribution of vanadium and tungsten at the M site influences the material's properties.
  • The findings contribute to the understanding of complex inorganic oxide structures and their formation.