where Q is the scattering vector, c i and c j are the atomic fractions in the glass, b i and b j are the X-ray scattering coefficient, i and j correspond to atomic types with M = 3 (La, B, and O). The partial scattering structure factor, S ij (Q), can be calculated from the partial radial distribution function, g ij (r). Details of this procedure are available in other studies. The equilibrated structures at 300 K were sampled every 100 fs and a time-averaged S(Q) was calculated. A peak near 2.0 Å-1 and a subsequent peak near 3.2 Å-1 were observed in the four glass systems. The intensities and positions of these peaks were dependent on the composition. The S(Q) values calculated from the AIMD-derived structures showed good agreement with experimental data in terms of intensity and phase. Furthermore, structural features were found to be well reproduced by the AIMD-based procedures used in this study. The radial distribution functions g(r) and running coordination numbers RCN(r) of the B-O pairs were calculated from the structures obtained at 300 K. These functions are defined as follows: