Nickel(II) phosphate is an inorganic compound with the formula Ni<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>. It is a mint green paramagnetic solid that is insoluble in water.
The hydrate Ni<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>÷8(H<sub>2</sub>O) is a light green solid, which can be prepared by hydrothermal synthesis and also occurs as the mineral arupite. It features octahedral Ni centers, which are bound to water and phosphate.