A new two-dimensional 8-ring network nickle phosphate Ni3 (PO4)2 · 8H2O was synthesized hydrothermally and its structure was determined by means of single-crystal X-ray diffraction. The Ni3 (PO4)2 · 8H2O crystal crystallizes in the monoclinic system, space group C2/m, with M = 128. 13, a = 0. 994 7(2) nm, b = 1. 321 7(3) nm; c = 0. 463 6(1) nm; β = 104. 80(3)°, V = 0. 589 3(2) nm3, Z = 2, R = 0. 027 2 and wR = 0. 057 5. The network structure consists of vertex-sharing which results in the formation of undulating 4-ring chains and 8-ring sheets.
