Figure 21 shows the pressure dependence of the fractions of (a) Si(j) (j = IV, V or VI), (b) Al(j) (j = IV, V or VI), and (c) O-(Al,Si)_i (i = 1, 2, 3 or 4) species found from molecular dynamics simulations of hot-compressed CaAS_25_50 glass at 27 Celsius.