Аннотация
Manganites LaM 3 I M 3 II Mn4O12(MI = Li, Na, K; MII = Mg, Ca) have been synthesized for the first time by the solid-phase reactions of lanthanum(III) and manganese(II) oxides and lithium, sodium, potassium, magnesium, and calcium carbonates. X-ray diffraction shows that all of them crystallize in the cubic crystal system. Their unit cell parameters are determined.