Uchiyama H, Tachibana S. Hydrothermal synthesis of dittmarite-group NH
4(Co
1-xMn
x)PO
4·H
2O particles as inorganic violet pigments.
RSC Adv 2024;
14:1939-1943. [PMID:
38192309 PMCID:
PMC10772953 DOI:
10.1039/d3ra07387d]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/28/2023] [Indexed: 01/10/2024] Open
Abstract
Dittmarite-group NH4(Co1-xMnx)PO4·H2O particles were prepared via a hydrothermal route. Single-phase platelike NH4(Co1-xMnx)PO4·H2O particles were obtained from aqueous solutions containing MnCl2·4H2O, CoCl2·6H2O, and (NH4)2HPO4, where the [Mn2+]/([Co2+] + [Mn2+]) mole ratios in the products were controlled by changing the MnCl2 and CoCl2 concentrations of the precursor solutions. The vivid violet colour of the ammonium cobalt phosphate (NH4CoPO4·H2O) particles was maintained upon substitution of Co2+ with Mn2+ ions up to x = 0.8, thus achieving an 80% saving of cobalt in the preparation of violet pigments.
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