Ve. Fedorov et al., STUDY OF ELECTRONIC STATES OF COPPER, BISMUTH, LEAD AND OXYGEN-ATOMS IN SOME SUPERCONDUCTING AND RELATED BISMUTH-CONTAINING OXIDE PHASES, Physica. C, Superconductivity, 282, 1997, pp. 1099-1100
Study of electronic states of different elements in complex Bi-contain
ing oxides by voltammetry of solids has showed that the electronic sta
tes of Bi, Cu and O atoms in some superconducting and related phases c
annot be presented in terms of conventional oxidation states and only
an adoption of unconventional oxidation states allows to describe accu
rately obtained experimental results.