Although SO2 has been shown to form polymeric phases under pressure, characterizing its polymeric forms has remained challenging due to its propensity to amorphize, which leads to spectral signal degradation. Here, the authors identify and characterize Ama2 and γ-SeO2-like SO2 crystalline polymeric phases featuring W-shaped units through a combination of refined high-pressure loading techniques, X-ray diffraction, Raman, and infrared spectroscopy.
- Huichao Zhang
- Philip Dalladay-Simpson
- Roman Martoňák
