A new layered zinc phosphate templated by protonated isonicotinate, [Zn2(C6H5NO2)2(HPO4)2]

An organic–inorganic hybrid compound, poly­[bis­[(pyridine‐4‐carboxyl­ato)­zinc(II)]‐di‐μ₃‐phosphato], [Zn₂(C₆H₅NO₂)₂(HPO₄)₂], has been hydro­thermally synthesized and structurally characterized. The crystal structure consists of two types of two‐dimensional layers of zinc hydrogenphosphate templated by protonated isonicotinate (ina) (or 4‐pyridine­carboxylic acid), which contain two crystallographically independent centrosymmetric [Zn₂(ina)₂(HPO4)₂] dimers as basic building units. The layers are interconnected via hydrogen‐bonding and heterocyclic ring interactions.