Nickel Sesquitelluride, Ni₂Te₃

Nickel Sesquitelluride, Ni₂Te₃, occurs in nature as the mineral melonite. It may be prepared by the addition of sodium telluride solution to one of nickel acetate acidulated with acetic acid. The resulting black precipitate has the composition Ni₂Te₃.4H₂O, and when heated in hydrogen yields Nickel Monotelluride, NiTe.