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The fully ordered high-pressure crystal structure of cyclopentanol (C5H10O) has been solved using single-crystal X-ray diffraction techniques on station 9.8 at the SRS Daresbury Laboratory. The crystal structure is characterized by the formation of molecular chains, denoted C_2^2(4) in graph set notation, with the molecules adopting a pseudo fourfold arrangement around the central core of hydrogen bonds.

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The structure of hexagonal L-cystine consists of pairs of hydrogen-bonded layers connected by disulfide bridges. The conformation about the bridges changes on compression to 3.7 GPa as the C—S—S—C units act like springs; other changes can be understood by examination of the distribution of voids in the ambient pressure structure.
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