Collect. Czech. Chem. Commun. 1981, 46, 3074-3082

Conditions for the existence of potassium antimonates with a M(I): Sb ratio greater than one

Milan Drátovskýa and Jiří Karlíčekb

a Department of Inorganic Chemistry, Charles University, 128 40 Prague 2
b Department of Chemistry, Pedagogical Faculty, 306 19 Plzeň


During a solubility study on the ternary system KOH-KSbO3-H2O, a method was found for the preparation of the crystalline (X-ray active) compound KSbO3.2.3 H2O and a new compound, K4Sb2O7.(5.6-5.8) H2O, was discovered. Both of these substances and an anhydrous substance with composition K4Sb2O7 crystallize in the tetrahedral system. Their constitution was characterized on the basis of their IR spectra.