Darstellung und Eigenschaften von Blei(IV)-arsenat-Gelen und kristallinem Blei(IV)-hydrogenarsenat-monohydrat

Lead(IV) acetate reacts with aqueous arsenic acid to yield lead(IV) arsenates, the state of which depends on the conditions of precipitation. At room temperature amorphous precipitates or gelatinous masses are obtained. Also clear solutions are obtained, which need sometime to become gelatinous. At 90°C colourless crystalline lead(IV) hydrogenarsenate-monohydrate, Pb(HAsO₄)₂ · H₃O, is obtained, isotypic with lead(IV) hyrdrogen-phosphate-monohydrate.