Fig. 1: Complete polymerization process of oxygen and continuous transformation of Fmmm-bct phase. | Nature Communications

Fig. 1: Complete polymerization process of oxygen and continuous transformation of Fmmm-bct phase.

From: Machine Learning simulations reveal oxygen’s phase diagram and thermal properties at conditions relevant to white dwarfs

Fig. 1

a The first bond length of oxygen varies from 1 TPa to 1 PPa (red line). b The relative enthalpy of Fmmm and bct (EFmmm-Ebct) varies with pressure (orange line), and the lengths of both short axes b (lb) and c(lc) of the Fmmm phase converge with pressure increase (red dash line). The blue shading area indicates that the difference in enthalpy between the structures is within ±10 meV, which is generally considered to be degenerate. The inset is a schematic diagram of the transition from Fmmm phase to bct phase. Source data are provided as a Source Data file.

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