Accession Number : AD0754188

Title :   On the Lattice Parameters and the Tetragonal Distortion of the Copper and Cadmium Manganite Systems,

Corporate Author : GHENT RIJKSUNIVERSITEIT (BELGIUM) NATURAL SCIENCE LAB

Personal Author(s) : Robbrecht,G. G. ; Henriet-Iserentant,C. M.

Report Date : 13 JUL 1970

Pagination or Media Count : 5

Abstract : The origin of the cubic-to-tetragonal transformation frequently observed in spinel systems with cupric and manganese ions is ascribed to the cooperative Jahn-Teller distortion of the oxygen tetra- and octahedron built on these cations. Copper manganite and its mixed compounds exhibit interesting properties. In these spinels, the presence of two Jahn-Teller active ions, Cu(++) and Mn(+++), might cause by opposite action a partly compensation of the distortion, as assumed by Miyahara. In order to investigate this situation and to compare with a similar Jahn-Teller ion case the crystal structure of the copper manganite Cu(x)Mn(1-x)Mn2O4 and the cadmium manganite Cd(x)Mn(1-x)Mn2O4 systems has been studied.

Descriptors :   (*MANGANATES, *CRYSTAL STRUCTURE), PHASE STUDIES, SPINEL, COPPER COMPOUNDS, CADMIUM COMPOUNDS, HEAT TREATMENT, BELGIUM

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE