Crystalline polymeric phases of sulphur dioxide.

ABSTRACT: SO₂ is a molecule of significant industrial and geochemical importance, known for its role in sulphuric acid production and its natural occurrence in volcanic processes. Recent studies have revealed pressure-induced amorphisation and the formation of polymeric amorphous phases in SO₂, behaviours analogous to those observed in other fundamental molecular systems such as CO₂, N₂, and CS₂. Here, we identify a mixture of polymeric SO₂ phases, with space groups Ama2 (Z = 2) and Pmc2₁ (Z = 8), the latter a homologue of γ-SeO₂, as the crystalline parents of the previously reported threefold-coordinated amorphous SO₂ observed above 25 GPa. These phases were characterized using a combination of advanc

SUBMITTER: Zhang H 

PROVIDER: S-EPMC12657963 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature