“…Table 1 summarizes the glass trassition temperature Tg, density ρ, moral volume, refractive index nD at 589 nm and Abbe number vD of xSnO -(100-x) P2O5 glasses where x = 52, 57, 62, 67 and 72 mol%. The data of glass trassition temperature, 1),2),13), 14) density 1), 14) and refractive index 1), 14) show similar tendencies with values reported previously. Figure 1 shows the variation of nD with SnO concentration.…”