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.