Quoting the really nice paragraph by the Editors of American Mineralogist about our paper:
Stangarone et al. (page 830) used density functional theory (DFT) simulations of the structures of zircon and reidite (polymorphs of ZrSiO4) to show that above 20 GPa zircon undergoes a displacive phase transition to a new polymorph (space group I-42d) which may trigger the reconstructive transformation to reidite. Thus, this study provides new insights into the zircon-reidite transition, which may be induced by shock in meteorite impacts. The results clarify the discrepancies between previous observations on natural and experimental samples.
