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Structural study by X-ray diffraction and transmission electron microscopy of the misfit compound (SbS1-xSex)(1.16)(Nb1.036S2)(2)
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Inorganic and Structural Chemistry.
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2010 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 45, no 8, 982-988 p.Article in journal (Refereed) Published
Abstract [en]

In the Sb-Nb-S-Se system, a new misfit layer compound (MSL) has been synthesized and its structure was determined by combining single crystal X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. It presents a composite crystal structure formed by (SbS1-xSex)slabs stacking alternately with double NbS2 layers and both can be treated as separate monoclinic subsystems. The (SbS1-xSex) slabs comprise a distorted, two-atom-thick layer with NaCl-type structure formed by an array of (SbX5) square pyramids joined by edges (X: S, Se); the NbS2 layers consist of (SbX5) trigonal prisms linked through edge-sharing to form sheets, just as in the 2H-NbS2 structure type. Both sublattices have the same lattice parameters a = 5.7672(19) angstrom, c = 17.618(6) angstrom and beta = 96.18(3)degrees, with incommensurability occurring along the b direction: b(1) = 3.3442(13) angstrom for the NbS2 subsystem and b(2) = 2.8755(13) angstrom for the (SbS1-xSex) subsystem. The occurrence of diffuse scattering intensity streaked along c* indicates that the (SbS1-xSex) subsystem is subjected to extended defects along the stacking direction.

Place, publisher, year, edition, pages
2010. Vol. 45, no 8, 982-988 p.
Keyword [en]
Layered compound, Crystal growth, X-ray diffraction, Crystal structure, Electron microscopy
National Category
Other Basic Medicine
Identifiers
URN: urn:nbn:se:su:diva-49424DOI: 10.1016/j.materresbull.2010.04.011ISI: 000279597100014OAI: oai:DiVA.org:su-49424DiVA: diva2:382107
Note
authorCount :6Available from: 2010-12-29 Created: 2010-12-14 Last updated: 2011-02-21Bibliographically approved

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