An open-framework zincophosphate, [C4N3H16][Zn4.5(PO4)4] 1, has been hydro- thermally synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in the tetragonal space group P4- with a = 14.512(5), c = 8.914(3) °A, V = 1877.3(11)
