catena-Poly[[tetra­kis­(hexa­methyl­phospho­ramide-κO)bis­(nitrato-κ(2) O,O′)yttrium(III)] [silver(I)-di-μ-sulfido-molybdenum(VI)-di-μ-sulfido]]

In the cation of the title compound, {[Y(NO(3))(2)(C(6)H(18)N(3)OP)(4)][AgMoS(4)]}(n), the Y atom is coordinated by eight O atoms from two chelating nitrate groups and four hexa­methyl­phospho­ramide (hmp) ligands, which gives rise to a distorted square-anti­prismatic environment. Together with the two nitrate ligands, the overall charge for the complex cation is +1, which leads to the anionic chain having a monovalent repeat unit. The polymeric anionic chain, with Mo—Ag—Mo and Ag—Mo—Ag angles of 161.916 (13) and 153.915 (13)°, respectively, presents a distorted linear configuration. The cations and the anions are linked via weak C—H⋯S hydrogen-bonding inter­actions while the cations exhibit inter­molecular C—H⋯O inter­actions. The structure is isotypic with the corresponding W, Yb, Eu, Nd, La and Dy complexes.