Reflectance Spectra of Terbium Oxides in the Range Tb2O3to Tb4O7

摘要

The diffuse reflectance spectra of terbium oxides (TbOx) have been studied in the composition range 1.5le;xle;1.75 from 300 to 1500 mmgr;. An ultraviolet cutoff was observed at about 325 mmgr;. A general decrease in reflectance was observed for an increase in the oxygen to metal ratio. A band was also noted in the 380 to 400hyphen;mmgr; region.