Purpose of this study
Main difficulty and its solution
Examples of change in diffraction pattern
People doubted the results of this study, and the phase relation were repeatedly studied [cf. Fei et al., 2004; Litasov et al., 2005].
But the results are the same. Very small Clapeyron slope!
Katsura, T., et al. (2003), Post-spinel transition in Mg2SiO4 determined by high P-T in situ X-ray diffractometry, Phys. Earth Planet. Inter., 136(1-2), 11-24.