Abstract
We investigated the stability of polymeric over a wide range of pressures, temperatures, and chemical environments. We find that the polymeric structure, consisting of a three-dimensional network of corner sharing tetrahedra, forms at 40–140 GPa and from a mixture at 39 GPa. An exceptional stability field of 0–286 GPa and 100–2500 K is documented for this structure, making it a viable candidate for planetary interiors. The stability of the tetrahedral polymeric motif of is a consequence of the rigidity of hybridized orbitals of carbon in a closed-packed oxygen sublattice.
2 More- Received 21 December 2022
- Revised 6 April 2023
- Accepted 24 April 2023
DOI:https://doi.org/10.1103/PhysRevMaterials.7.053604
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