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The laterite deposits which mainly contain Mg-Ni-Fe silicates can be used as the resource of nickel and nickel alloy.There is a kind of pyroxene ((Mg, Fe) SiO3) as a main phase after the laterite is calcined, in which nickel cations substitute for Mg or Fe as being an allomer.The fusion of pyroxene with alkalis is one of the effective methods of releasing Mg, Ni and Fe from the network of their silicates, which is the essential step for utilization of Mg, Fe and Ni as metals and alloys.