Abstract:The crystal structures of two zincophosphate networks prepared in the presence of 1,5-diaminopentane (dap) are described. In Zn 3 (PO 4 ) 2 (C 5 H 14 N 2 ) 2 ·3H 2 O (1) the dap forms Zn-N coordinate bonds to generate an unusual three-dimensional "hybrid" framework constructed from ZnO 3 N, ZnO 2 N 2 and PO 4 tetrahedra with three different types of elongated channels occupied by water molecules. In C 5 H 16 N 2 ·Zn 3 (PO 4 ) 2 (HPO 4 )·H 2 O; (2) the doubly-protonated H 2 dap acts in a more typical way to template double layers of vertex-sharing ZnO 4 , PO 4