Spectroscopic and Physical Properties of Bi₂O₃-B₂O₃-ZnO-Li₂O Glasses

Table 3

Physical parameters of the glass system 50Bi₂O₃-15B₂O₃-(35-x)ZnO-xLi₂O.

Parameter	𝑥=0	𝑥=5	𝑥=10	𝑥=15	𝑥=20
Avg·mol·wt.	271.9	269.3	266.7	264.1	261.1
𝑁 (×10^21)/cc	—	1.30	2.55	2.80	5.02
𝑅 (Å)	—	9.16	7.31	6.40	5.84
Δ𝑇𝑔 (°C)	25.8	26.5	43.8	25.5	22.8
𝐶𝑝 (J/mol°C)	27.2	23.6	19.5	33.2	34.2
Δ𝐶𝑝 (J/mol°C))	3.5	2.2	1.1	5.3	4.3

𝑁: Li⁺ ion concentration.
𝑅: Li⁺ ion interionic distance.