Raman Spectroscopy, X-Ray, SEM, and DTA Analysis of Alkali-Phosphate Glasses Containing WO₃ and Nb₂O₅

Table 2

Raman band positions of the LiW-40 and NaW-40 samples and their assignments.

LiW-40		NaW-40
Band position	Width (cm^−1)	Band position	Width (cm^−1)	Assignment
160.98	64.94	159.53	63.30	Deformation
250.81	133.03	253.69	132.79	Deformation
377.69	112.73	382.93	80.54	Deformation
566.96	33.02	544.04	24.03	Deformation
591.63	22.08	578.07	71.09	𝜈(Nb-O)
614.67	29.68	616.77	40.38	𝜈(Nb-O)
640.67	25.74	639.76	23.78	𝛿(Nb-O)-𝛿(POP)
764.52	90.62	763.39	86.42	𝜈(M-O-P)
834.19	72.51	843.44	82.50	𝜈(W-O)
893.16	66.56	916.07	54.02	𝜈(Nb-O)/𝜈(W-O)
956.63	66.56	958.59	40.08	𝜈(W-O)
		979.50	84.02	𝜈(Nb-O) and/or 𝜈(W-O)
1017.92	74.18			𝜈(Nb-O)
1075.26	72.50	1038.15	106.63	𝑣𝑠(PO3)^2−
1144.61	87.79	1129.17	136.90	𝑣𝑠(PO2)^−
1234.05	88.50	1249.22	78.98	𝑣as(PO2)^− and/or 𝑣(PO)