Poly[3-methyl-pyridinium [(μ(2)-di-hydrogen phosphito)bis(μ(3)-hydrogen phosphito)dizinc]].

In the title compound, {(C(6)H(8)N)[Zn(2)(HPO(3))(2)(H(2)PO(3))]}(n), the constituent ZnO(4), HPO(3) and H(2)PO(3) polyhedra of the inorganic component are linked into (010) sheets by Zn-O-P bonds (mean angle = 134.4°) and the layers are reinforced by O-H⋯O hydrogen bonds. The protonated templates are anchored to the inorganic sheets via bifurcated N-H⋯(O,O) hydrogen bonds.