Manganite with mixed complex oxides Bi 0.3 Dy 0.7 Mn 7 O 12 was synthesized by the furnace method. The Pechini method used urea as a complexing agent. The composition and structure of the synthesized manganite were determined experimentally. For the first time, the structure, the type of the syngony, the parameters of the unit cells, the x-ray diffraction density of the manganite were determined by X-ray phase analysis: a = 7.5472, b = 8.5244, c = 5.7836 A, V un.cell. = 372.090A 3 , Z = 4, ρ rad. = 7,120 g / cm 3 , ρ pyc. = 7.09 g / cm 3 . The pycnometric density was measured 5-6 times and the data were averaged. Toluene served as an indifferent fluid.
