Effect of Stepwise Replacement of Non-Oxide to Oxide Group on Structural Properties of Bi_𝟐O_𝟑·LiF·B_𝟐O_𝟑 Glasses

Table 1

FTIR absorption assignments of the samples with x = 0, 5, 10, 15, and 20 in the compositions 𝑥Bi₂O₃⋅(40−𝑥)LiF⋅60B₂O₃.

Wavenumber; (cm^−1)	Assignment
685	Bending of B–O–B linkage in borate network
779	B–F bonds
901	Bi–O and Bi–O–Bi bands in BiO6 octahedra
910	B–O bond stretching in BO4 units
1100	Pentaborate and diborate species
1210, 1220	Stretching vibrations of B–O bonds in BO3 units from meta and orthoborate groups
1295	BO2F units and Bi–O–Bi vibrations of BiO6 octahedral units
1365	B–O asymmetric stretching vibrations in BO3 and BO3^− units
1370	BiO units
1440, 1530	B-O^− stretching vibrations of BO3 units from varied types of borate groups