X-ray K-absorption studies of molybdenum sulphide, selenides and tellurides

X-ray K-absorption studies of molybdenum sulphide, selenides and tellurides have been carried out using 400-mm bent crystal (mica) spectrograph. K-absorption edge of molybdenum in its selenides, tellurides and sulphide lies on the higher energy side with respect to that in the molybdenum metal; the shift in higher selenide and telluride, namely MoSe2 and MoTe2 being smaller than that in the lower selenide and telluride, Mo3Se4 and Mo3Te4 respectively. On the other hand selenium K-absorption edge changes from low energy side in Mo3Se4 to higher energy side in MoSe2 with respect to that in the selenium metal