Rinman's green, also referred to as Rinmann's green, is obtained by doping cobalt(II) oxide into zinc oxide.
Sven Rinman, a Swedish chemist, discovered this compound in 1780.
Zinc oxide–derived pigments have been used in many industries and processes. It is rarely used because it is a weak chromophore and relatively expensive compared to
chromium(III) oxide. The structure and color of compositions Zn1−xCoxO depends on the value of x. For x ≤ 0.3, the material adopts the
Wurtzite structure (of ZnO) and is intensely green. For x ≥ 0.7, the material has the
sodium chloride structure (of CoO) and is pink. Intermediate values of x give a mixture of the two phases. Cobalt green has been tested for use in "
spintronic" devices. Cobalt green is attractive in this application because it is magnetic at room temperature. == See also ==