Ftir and Raman Spectroscopic Study of a Complex Perovskite: Ca_0.91-XCe_0.09Rb_0.04Cs_x[(Zr_0.50Ti_0.45)Al_0.05]O₃, X=0.2 to 0.4, Dedicated for Radioactive Waste Confinement

Perovskite is able to sequester simultaneously, in its structure, both actinides and alkaline-earth elements. This study is an attempt to synthesize a complex perovskite Ca_0.91-xCe_0.09Rb_0.04Cs_x[(Zr_0.50Ti_0.45)Al_0.05]O₃ (0.2≤x≤0.4), doped in the same time, with Ce, Cs and Rb. The synthesis is conducted by sintering at 1150°C during 16h. XRX analysis confirms the perovskite formation. SEM observations show a less porous microstructure. FTIR analysis reveals TiO₆, Ti-O-Ti, Ti-O and Zr-O vibrations. Raman spectroscopy indicates many orthorhombic perovskite active modes, as: Ti-O₆ and Ti-O₃ torsions, ZrO₇, CaO₈ vibrations, the totally symmetric oxygen, and the O-octahedron cage rotation.