Specific features of structural, dielectric, and optical properties of CdTiO3

The optical and dielectric properties and the structure of crystalline and ceramic perovskite CdTiO3 modifications have been investigated. The multipl ication of the unit cell along three perovskite axes is found. The new poss ible space groups of symmetry D-2h(18) and D-2h(21) are determined. It is e lucidated how small radiation doses affect the structure and properties of crystalline and ceramic perovskite modifications. Analysis of the intensiti es of diffraction reflections demonstrate that the defect formation leads t o an increase in the antiparallel displacements of Cd atoms in the unit cel l. (C) 2000 MAIK "Nauka/Interperiodica".