X-Ray Diffraction and X-Ray Absorption Spectrocopic Analyses for the Ruthenium Perovskites
نویسندگان
چکیده
According to the Rietveld refinements and X-ray absorption studies at the Ru K-edge, it is found that three compounds La2BRuOg (B=Li, Mg, and Zn) are monoclinic with space group of P21/n, and that the mthenium ions with two oxidation states +IV (d4) and +~(d3) are stabilized in an octahedral site of oxide lattices. A correlation is obtained between absorption edge position and the oxidation states of ruthenium. The bond lengths of (Ru-0) for both oxidation states (RuIV and RUV) have been quantitatively obtained by the EXAFS analysis.
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