Citation: Plonka, A. M.; Dera, P.; Irmen, P.; Rivers, M. L.; Ehm, L.; Parise, J. B. (2012). Beta-diopside, a new ultrahigh-pressure polymorph of CaMgSi2O6 with six-coordinated silicon Note: P = 38.6 GPa. Geophysical Research Letters, 39, pp. L24307-4.