Abstract
Abstract The reflection spectra of two lead silica glasses have been measured over an extensive energy range. Measurements have also been made on a high lead concentration glass and on PbO, in the region of the 5d core excitations. By comparing the spectra of various lead compounds, and using the atomic model to interpret core transitions, it has been found that these give information about the chemical environment of an ion. Whereas in PbO the Pb-O bond appears covalent, in a glass, even in one containing a very large proportion of lead, it appears ionic.
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