Phase diagram of carbon dioxide: update and challenges

Abstract

Abstract We present the phase diagram of carbon dioxide with the most recent finding of coesite-like carbon dioxide, a missing analog to SiO2, address several controversies on phase VII and phase IV in terms of the phase metastabilities and thermal path-dependent phase transitions, and discuss the implications to the generalized phase diagram of simple molecular solids. Keywords: coesite-like CO2 molecular solidextended solidnon-molecular solids Acknowledgements The present study has been supported by NSF-DMR (Grant No. 0854618), DTRA (Grant No. HDTRA1-09-1-0041), and DOE-NNSA (# DE-F603-97SF21388).