Molecular dissociation and two low-temperature high-pressure phases of H2S

Hiroshi Fujihisa, Hiroshi Yamawaki, Mami Sakashita, Atsuko Nakayama, Takahiro Yamada, Katsutoshi Aoki

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39 Citations (Scopus)


We performed powder x-ray experiments on hydrogen sulfide (H2S) under high pressure at room and low temperatures. Phase V appearing above 27 GPa at room temperature was confirmed by x ray to be associated with a molecular dissociation. The molecular dissociation was first observed at 150 K at a higher pressure around 43 GPa. Two new low-temperature high-pressure phases III′ and IV′ were discovered. Spiral chains of sulfur atoms are found in both phases as well as in phase IV.

Original languageEnglish
Article number214102
Pages (from-to)214102-1-214102-5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number21
Publication statusPublished - 2004 Jun


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