Infrared Properties of Mixed Lead-Bismuth Oxides,

摘要

Five bismuth compounds with the cubic sillenite structure (I23), Bi12SiO20, Bi12GeO20, Bi12TiO2, Bi12ZnO19and Bi12PbO19were synthesized. Infrared and Raman spectra of these compounds and of Bi2O3with and without N:O were measured. It is shown that fundamental mode frequencies in these covalent oxides are surprisingly high and that hope for an oxide window material has become vanishingly small.