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SYNTHESIS, HIGH-RESOLUTION ELECTRON-MICROSCOPY AND CRYSTAL-STRUCTURE REFINEMENT OF THE CLUSTER COMPOUND BA3NB16O23 BY X-RAY AND NEUTRON-DIFFRACTION
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1994 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 203, 209-216 p.Article in journal (Refereed) Published
Abstract [en]

Ba3Nb16O23 was prepared by reducing a mixture of BaCO3 and Nb2O5 with acetylene soot under vacuum at 1550-1600-degrees-C. The structure was determined from high resolution electron microscopy images and was refined by the Rietveld technique using X-ray and neutron powder diffraction data. The unit cell parameters are a = 20.9301(4) angstrom, b = 12.4785(3) angstrom and c = 4.1619(1) angstrom, space group Cmmm, Z = 2. The crystal structure can be described as an intergrowth of BaNbO3 and NbO. Characteristic building units are quadruple chains of corner-sharing Nb6 octahedra connected via columns with a perovskite-type structure to form a three-dimensional network.

Place, publisher, year, edition, pages
1994. Vol. 203, 209-216 p.
Research subject
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-43905DOI: 10.1016/0925-8388(94)90737-4OAI: oai:DiVA.org:su-43905DiVA: diva2:359731
Available from: 2010-10-29 Created: 2010-10-29 Last updated: 2017-12-12Bibliographically approved

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SVENSSON, G
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Department of Materials and Environmental Chemistry (MMK)
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