Elements of X-Ray Diffraction

A possibility of solid-phase synthesis of new cerium double tellurites with s -elements from the oxides of cerium(IV), tellurium(IV) and magnesium (calcium, strontium) carbonates was demonstrated. It was determined by the X-ray diffraction method that the magnesium-cerium tellurite crystallizes in a cubic system, while calcium-cerium and strontium-cerium tellurites crystallize in the tetragonal crystal system.The temperature dependence of the electrical resistance of these compounds in the range of 300–600 K was measured. The plots include sharp anomalous jumps due probably to the phase transitions of type II.