High-temperature mass spectrometric vaporization study of the Bi-Sb-O system

The vapor composition in the Bi-Sb-O system has been determined by Knudsen cell mass spectrometry. We have calculated the individual mass spectra of the Bi3SbO6, Bi2Sb2O6, and BiSb3O6 molecules and determined the partial pressures of all the vapor species identified. Bi3SbO7 and BiSbO4 have been shown to sublime congruently. The results have been used to construct p-x sections for the pseudobinary oxide systems Bi2O3-BiSbO4 and BiSbO4-Sb2O4.