Structure determination and physical properties of the misfit layered compound (Pb{sub 2}FeS{sub 3}){sub 0.58}NbS{sub 2}

Journal Article · Mon Feb 01 00:00:00 EST 1999 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1998.8068· OSTI ID:329190

Lafond, A; Deudon, C; Meerschaut, A; Palvadeau, P; Moelo, Y ^[1]; Briggs, A ^[2]

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1. CNRS-Univ. de Nantes (France). Lab. de Chimie des Solides
2. Centre de Recherche sur les Tres Basses Temperatures-CNRS, Grenoble (France)

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.

• OSTI ID: 329190
• Journal Information: Journal of Solid State Chemistry, Vol. 142, Issue 2; Other Information: PBD: 1 Feb 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
ELECTRICAL PROPERTIES
MAGNETIC PROPERTIES
LEAD SULFIDES
IRON SULFIDES
NIOBIUM SULFIDES
LAYERS
VALENCE