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Cobalt green is an ambiguous term for either of two families of green inorganic pigments. Both are obtained by doping cobalt(II) oxide into colorless host oxides.

Spinel-based cobalt green

Doping Co(II) into Mg(II) and Zn(II) sites of Mg₂TiO₄ and Zn₂TiO₄, respectively gives one family of cobalt greens. These materials adopt the spinel structure.

Rinman's green

Rinman's green, also referred to

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