SPECTROSCOPIC STUDIES OF SOME PHOSPHATE GLASSES WITH MOLYBDENUM IONS

Abstract

The structure of x MoO 3·(100-x)[2 P 2 O 5· PbO ] glass system with 0≤x≤50 mol % is investigated by IR and Raman spectroscopies. The characteristic bands of the glass matrix [2 P 2 O 5· PbO ] and MoO 3 oxide due to the stretching and bending vibrations are identified. This allows us to identify the specific structural units which occur in these glasses and to deduce the role of the MoO 3 oxide on the structural aspects of 2 P 2 O 5· PbO network. At high MoO 3 content a depolymerization of the phosphate structure appears and the short phosphate chain units or ring structures are formed too.