Structure of Nd{sub 5}Mo{sub 3}O{sub 16+δ} Single Crystals Doped with Tungsten

Journal Article · Tue May 15 04:00:00 EDT 2018 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774518030021· OSTI ID:22758249

Sorokina, N. I.; Alekseeva, O. A. ^[1]; Zubavichus, Y. V. ^[2]; Artemov, V. V. ^[1]; Kharitonova, E. P.; Orlova, E. I.; Voronkova, V. I. ^[3]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” (Russian Federation)
2. National Research Centre “Kurchatov Institute,” (Russian Federation)
3. Moscow State University, Faculty of Physics (Russian Federation)

The structure of tungsten-doped Nd{sub 5}Mo{sub 3}O{sub 16+δ} single crystals has been investigated by X-ray diffraction analysis, energy-dispersive X-ray spectroscopy (EDXS) microanalysis, and extended X-ray absorption fine-structure (EXAFS) spectroscopy. Tungsten atom, which partially replaces molybdenum atoms in the structure, is found to be located close (at a distance of 0.57 Å) to the Mo atom site. The interstitial oxygen atom О3 shifts from the crystallographic site with coordinates (0.5, 0.5, 0) to the site with coordinates (0.43, 0.48, 0.04) and complements the tungsten coordination to octahedral. The decrease in the unit-cell parameter and conductivity with an increase in the tungsten concentration in the sample is shown to be related to the fact that the interstitial oxygen atom О3 (responsible for conductivity) is in the coordination environment of tungsten atom.

• OSTI ID: 22758249
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 3 Vol. 63; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ATOMS
CONCENTRATION RATIO
CRYSTALLOGRAPHY
DOPED MATERIALS
FINE STRUCTURE
INTERSTITIALS
MICROANALYSIS
MOLYBDATES
MOLYBDENUM
MONOCRYSTALS
NEODYMIUM COMPOUNDS
OXYGEN
TUNGSTEN
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY