Table 4. Vibrational Modes Observed Via Raman Spectroscopy of the Mg_1/2SO₂Ag_1/3O₂ Residue^a.

Raman bands (cm–1)	assignment to groups
205, 295	Ag–S(ss) 35
400	Mg–O
451	O–S–O(sb)
474	Ag–O
497	Ag–S35
510	Mg–O
607, 615	O–S–O(ab)
681, 699, 797	H2O (absorbed from the environment)
850	Ag–OH
964	S–O(ss)
1023, 1052	S–O
1060 a 1150	S–O(as), Mg–O, Ag–O
1180 a 1400	Mg–O e Ag–O
1501, 1612	Ag–O35
1772	S–O
1934, 2037, 2355	H2O (absorbed from the environment)

^ass = symmetric stretching, sb = symmetric bending, ab = asymmetric bending, and as = asymmetric stretching.