However, in 2020, two research groups individually prepared ice Ic without stacking disorder; Komatsu et al. prepared C2 hydrate at high pressure and decompressed it at 100 K to make hydrogen molecules extracted from the structure, resulting in ice Ic without stacking disorder; del Rosso et al.
In 2020, two research groups independently created ice Ic without stacking disorder. Komatsu et al. synthesized C2 hydrate under high pressure and cooled it to 100 K to extract hydrogen molecules from the structure, leading to ice Ic without stacking disorder; del Rosso et al.