Fig. 1.

Structure factor, S(Q) (A–D), and pair distribution function, G(r) (E–H), of MgSiO₃ glass up to 111 GPa. S(Q) was determined at the Q range up to 16 Å⁻¹ at ambient pressure (A), up to 13 Å⁻¹ for the experiments 1 (B) and 2 (C) and up to 11.6 Å⁻¹ for the experiment 3 (D). S(Q) is displayed by a vertical offset of +0.42 for B and +0.48 for C and D. G(r) is displayed by a vertical offset of +0.18 for F and +0.22 for G and H.