Abstract:
Manganite ferrites NdM (1.5) (II) MnFeO6 (M-II = Mg, Ca, Sr, Ba) were synthesized from neodymium(III), manganese(III), and iron(III) oxides and alkaline-earth metal carbonates by a ceramic technology. By grinding the obtained compounds in a ball mill, their nanostructured particles were produced, the sizes of which were determined with an electron microscope. X-ray diffraction study established that the nanostructured compounds crystallize in the cubic and tetragonal systems with the following lattice parameters: NdMg1.5MnFeO6 (tetragonal): a = 10.955 , c = 17.848 , V (0) = 2141.975 (3), Z = 16, V (e1.cel1) (0) = 133.873 (3), rho(X-ray) = 4.80 g/cm(3), and rho(pycn) = 4.76 +/- 0.05 g/cm(3); NdCa1.5MnFeO6 (cubic): a= 10.809 , V (0) = 1262.864 (3), Z = 8, V (e1.cel1) (0) = 157.858 (3), rho(X-ray) = 4.32 g/cm(3), and rho(pycn) = 4.27 +/- 0.03 g/cm(3); NdSr1.5MnFeO6 (cubic): a = 10.911 , V (0) = 1298.953 (3), Z = 8, V (e1.cel1) (0) = 162.369 (3), rho(X-ray) = 4.93 g/cm(3), and rho(pycn)= 4.88 +/- 0.05 g/cm(3); and NdBa1.5MnFeO6 (tetragonal): a = 11.011 , c = 18.001 , V (0) = 2182.479 (3), Z = 16, V (e1.cel1) (0) = 136.405 (3), rho(X-ray) = 6.78 g/cm(3), and rho(pycn)= 6.75 +/- 0.07 g/cm(3).
