This volume contains the hydrous oxo compounds of the metals Sb to Cr (System Nos. 18 to 52) with molybdenum. (The corresponding anhydrous compounds have been described in the volumes "Molybdan" Erg.-Bd. B 1 and B 2.) With these metals, molybdenum forms monomolyb dates, isopolymolybdates, peroxomolybdates, and molybdometalates. Antimony forms only the compound H3SbM01204o' n H0 and with bismuth no hydrous oxo 2 compounds are known. More than half the volume describes the monomolybdates, isopolymolybdates, and peroxo molybdates of the alkali and alkaline earth metals, including ammonium and...