New layered caesium zinc hydrogen phosphate, CsZn2.5(HPO4)3· 2H2O; synthesis, crystal structure and thermal transformation
Abstract
The synthesis, crystal structure and thermal transformation of a new caesium zinc hydrogen phosphate hydrate, CsZn2.5(HPO4)3·2H2O, is reported. This material crystallised from a gel with molar composition 1 ZnO∶0.48 P2O5∶0.24 Cs2O∶12 H2O∶4.8 MeCO2H, and pH of 1.0, after two months at room temperature. The crystal structure of CsZn2.5(HPO4)3·2H2O has layers built from PO4 and ZnO4 tetrahedra and with other zinc atoms forming octahedra by coordination to