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Hydrothermal synthesis of dittmarite-group NH(CoMn)PO·HO particles as inorganic violet pigments. | LitMetric
Dittmarite-group NH(CoMn)PO·HO particles were prepared a hydrothermal route. Single-phase platelike NH(CoMn)PO·HO particles were obtained from aqueous solutions containing MnCl·4HO, CoCl·6HO, and (NH)HPO, where the [Mn]/([Co] + [Mn]) mole ratios in the products were controlled by changing the MnCl and CoCl concentrations of the precursor solutions. The vivid violet colour of the ammonium cobalt phosphate (NHCoPO·HO) particles was maintained upon substitution of Co with Mn ions up to = 0.8, thus achieving an 80% saving of cobalt in the preparation of violet pigments.
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