Fig. 4: Relative enthalpies of the Mg2SiO4 polymorphs at 0 K as a function of pressure up to 20 GPa.
From: Poirierite, a dense metastable polymorph of magnesium iron silicate in shocked meteorites
The enthalpies are expressed in rydberg (Ry) units for the Mg2SiO4 component.
