抄録
Raman spectra have been measured for the potassium borophosphate glasses. The observed bands are assigned to six-membered borate rings, phosphate chain or network composed by O=PO3/2 or KPO3 units and six-membered borophosphate clusters incorporating [PO4/2]+ or O=PO3/2 units by taking the Raman bands characteristic of the borate and phosphate units in the literature as the reference. Crystalline BPO4 type network is absent in the present glasses. The following four bands have been attributed to the borophosphate units; 1030cm-1 to PO2 with the P atom bonded to B, 720cm-1 to the breathing vibration of six-membered B-O-P rings, 600 and 550cm-1 to P-O-B bonds. The coexistence of the BO3 and PO2.5 have also been proposed.
