Collect. Czech. Chem. Commun. 1998, 63, 2036-2043

Formation of a Double Salt and Mixed Crystals in the Ca(HCOO)2-Cd(HCOO)2-H2O System

Violeta Z. Vassileva

Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev bl. 11, Sofia 1113, Bulgaria


By solubility method in the Ca(HCOO)2-Cd(HCOO)2-H2O system at 25 and 50 °C, the formation of a double salt CaCd(HCOO)4 and mixed crystals Ca1-xCdx(HCOO)2 was established. The double salt formation is explained by the electronic configuration of the metal ions involved. Formation of the mixed crystals, possessing the α-Ca(HCOO)2 structure, is attributed to the ability of the Cd2+ ions to accept the coordination environment, characteristic of the Ca2+ ions in α-Ca(HCOO)2.

Keywords: Solubility diagrams; Calcium/cadmium formate double salt; Calcium/cadmium formate mixed crystals; Calcium; Cadmium.