Synthesis and crystal structure of MTe2O6 (M  Ce, Th)

Mixed oxides MTe₂O₆ (M  Ce, Th) were prepared at a temperature of 973 K. Structural characterization of these materials has been carried out by X-ray and electron diffraction. The structures have been refined by Rietveld analysis of X-ray powder diffraction data recorded at room temperature. The structures have monoclinic symmetry, space group P2₁/n, and the lattice parameters are $\text{a = 7.0197(8)}\text{A}\text{̊}$, $\text{b = 11.0434(8)}\text{A}\text{̊}$, $\text{c = 7.3327(1)}\text{A}\text{̊}$ and β = 108.007(8)° for CeTe₂O₆ and $\text{a = 7.1954(1)}\text{A}\text{̊}$, $\text{b = 11.2183(6)}\text{A}\text{̊}$, $\text{c = 7.4638(8)}\text{A}\text{̊}$ and β = 108.063(3)° for ThTe₂O₆.