title: The quinter-nary thio-phosphate Cs(0.5)Ag(0.5)Nb(2)PS(10).
abstract: The quinter-nary thio-phosphate Cs(0.5)Ag(0.5)Nb(2)PS(10), cesium silver tris-(disulfido)[tetra-thio-phosphato(V)]diniobate(IV), has been prepared from the elements using a CsCl flux. The crystal structure is made up of (∞) (1)[Nb(2)PS(10)] chains expanding along [010]. These chains are built up from bicapped trigonal-prismatic [Nb(2)S(12)] units and tetra-hedral [PS(4)] groups and are linked through a linear S-Ag-S bridge, forming a two-dimensional layer. These layers then stack on top of each other, completing the three-dimensional structure with an undulating van der Waals gap. The disordered Cs(+) ions reside on sites with half-occupation in the voids of this arrangement. Short [2.8843 (5) Å] and long [3.7316 (4) Å] Nb-Nb distances alternate along the chains, and anionic S(2) (2-) and S(2-) species are observed. The charge balance of the com-pound can be represented by the formula [Cs(+)](0.5)[Ag(+)](0.5)[Nb(4+)](2)[PS(4) (3-)][S(2) (2-)](3).
authors.affiliation: Division of Energy Systems Research and Department of Chemistry, Ajou University, Suwon 443-749, Republic of Korea.
authors.forename: Sojeong
authors.initials: S
authors.lastname: Park
authors.forename: Hoseop
authors.initials: H
authors.lastname: Yun