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Author Lafond, A. ♦ Deudon, C. ♦ Meerschaut, A. ♦ Palvadeau, P. ♦ Moelo, Y. ♦ Briggs, A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CRYSTAL STRUCTURE ♦ ELECTRICAL PROPERTIES ♦ MAGNETIC PROPERTIES ♦ LEAD SULFIDES ♦ IRON SULFIDES ♦ NIOBIUM SULFIDES ♦ LAYERS ♦ VALENCE
Abstract A crystal structure study of the layered misfit compound (Pb{sub 2}FeS{sub 3}){sub 0.58}NbS{sub 2} has been performed using the composite approach. The structure can be described on the basis of a regular alternation of [Pb{sub 2}FeS{sub 3}] and [NbS{sub 2}] slabs stacked along the c direction. The [Pb{sub 2}FeS{sub 3}] part has a thickness of three layers, the central {vert_bar}FeS{vert_bar} layer being sandwiched between the two external {vert_bar}PbS{vert_bar} layers. Thus, Pb atoms on the exterior sides of this part are in a squared-pyramidal sulfur coordination, while Fe atoms in the central zone are octahedrally and tetrahedrally surrounded by sulfur atoms. From bond valence calculations, Fe atoms are found in the +III oxidation state whatever their environment. This is corroborated by a Moessbauer study. Magnetic and electrical properties complete this study.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-02-01
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 142
Issue Number 2


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