The quinternary thiophosphate Cs0.5Ag0.5Nb2PS10

The quinternary thiophosphate Cs0.5Ag0.5Nb2PS10

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The quinternary thiophosphate Cs0.5Ag0.5Nb2PS10, cesium silver tris(disulfido)[tetrathiophosphato(V)]diniobate(IV), has been prepared from the elements using a CsCl flux.The crystal Parsley Leaf structure is made up of ∞1[Nb2PS10] chains expanding along [010].These chains are built up from bicapped trigonal-prismatic [Nb2S12] units and tetrahedral [PS4] 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 Patio Umbrellas 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 S22− and S2− species are observed.

The charge balance of the compound can be represented by the formula [Cs+]0.5[Ag+]0.5[Nb4+]2[PS43−][S22−]3.