Structure and properties of silver phosphate glasses with tungsten trioxide

• Glass-forming region in the system Ag 2 O-WO 3 -P 2 O 5 was determined. • Tungsten-phosphate glasses with only 10 mol% P 2 O 5 were prepared. • Glass color depends on the WO 3 content and optical basicity. • Raman and 31 P MAS NMR reflect transformation of phosphate network to tungstate phosphate network. • The shift of Raman band of W=O bonds vibration depends on the content of Ag + ions. Phosphate glasses from the ternary Ag 2 O–WO 3 –P 2 O 5 system were prepared and investigated. A total of