Synthesis and study of ammonium hexamolybdobismuthate(III)

Ammonium hexamolybdobismuthate(III) of composition (NH4)3[BiMo6O18(OH)6] · 7H2O (I) was synthesized and studied by mass spectrometry, X-ray diffraction, IR spectroscopy, and thermogravimetry. The compound is monoclinic: a = 10.438 A, b = 7.909 A, c = 18.127 A, β = 96.59°, V = 1486.76 A3, ρcalc = 3.32 g/cm3, Z = 2.