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Nickel Arsenites

Nickel Orthoarsenite, Ni3(NaO3)2, is formed when a mixture of nickel oxide and arsenious oxide is heated to about 465° C. It is obtained as a bright green amorphous precipitate by the addition of a solution of sodium metarsenite to aqueous nickel nitrate. If an alkali orthoarsenite or tetrarsenite is added to a solution of a nickel salt, the tetrarsenite, Ni3As4O9, is obtained as a light-green precipitate. Both salts are decomposed by heat with loss of arsenious oxide. A basic salt of composition 14NiO.As2O3 has also been described.

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