Thermal decomposition of bromine gordaite: NaZn4(OH)6(SO4)Br·6H2O

Synthesis and characterization of gordaite, osakaite and simonkolleite by different methods: Comparison, phase interconversion, and potential corrosion protection applications

“…The most cited method for synthesizing this kind of LHS is by the ZnO method [8,15], which consists in the hydrolysis of ZnO powder which forms in equilibrium Zn(OH) 2 and, in presence of other anions, this equilibrium is influenced, leading to the formation of the layered hydroxide salts (equations 1 and 2) in a solid-state reaction. For instance, the hydrolysis of ZnO in the presence of ZnSO 4 and NaCl will lead to the formation of GOR [8,15,21,[24][25][26]. This method, however, leads frequently to contamination of GOR with phases of OSK, suggesting competition between the formation of these species, and thus making this method no the most suitable to obtain a pure phase of the cationic exchanger LHS.…”