X-ray absorption near-edge studies of BaBiO<sub>3</sub>, BaBi<sub>1-x</sub>Pb<sub>x</sub>O<sub>3</sub> and Ba<sub>1-x</sub>K<sub>x</sub>BiO<sub>3</sub> systems
Z N Akhtar; M J Akhtar; C R A Catlow; Z N Akhtar; Dept. of Chem., Keele Univ., UK; M J Akhtar; Dept. of Chem., Keele Univ., UK; C R A Catlow; Dept. of Chem., Keele Univ., UK
Журнал:
Journal of Physics: Condensed Matter
Дата:
1993-04-19
Аннотация:
The valence state of Bi in pure and doped (Pb, K) BaBiO<sub>3</sub> has been determined by X-ray absorption near-edge structure (XANES) spectroscopy. In all materials the Bi valence is found to be close to IV. A disproportionation of Bi(IV) into Bi(III) and Bi(V) is not indicated by analysis of the XANES data. The valence state of Pb is also found to be IV in BaBi<sub>1-x</sub>Pb<sub>x</sub>O<sub>3</sub>.
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