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New porous water ice metastable at atmospheric pressure obtained by emptying a hydrogen-filled ice

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  • Leonardo del Rosso

    (Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi
    Università degli Studi di Firenze)

  • Milva Celli

    (Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi)

  • Lorenzo Ulivi

    (Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi)

Abstract

The properties of some forms of water ice reserve still intriguing surprises. Besides the several stable or metastable phases of pure ice, solid mixtures of water with gases are precursors of other ices, as in some cases they may be emptied, leaving a metastable hydrogen-bound water structure. We present here the first characterization of a new form of ice, obtained from the crystalline solid compound of water and molecular hydrogen called C0-structure filled ice. By means of Raman spectroscopy, we measure the hydrogen release at different temperatures and succeed in rapidly removing all the hydrogen molecules, obtaining a new form of ice (ice XVII). Its structure is determined by means of neutron diffraction measurements. Of paramount interest is that the emptied crystal can adsorb again hydrogen and release it repeatedly, showing a temperature-dependent hysteresis.

Suggested Citation

  • Leonardo del Rosso & Milva Celli & Lorenzo Ulivi, 2016. "New porous water ice metastable at atmospheric pressure obtained by emptying a hydrogen-filled ice," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13394
    DOI: 10.1038/ncomms13394
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    Cited by:

    1. Leonardo Del Rosso & Milva Celli & Lorenzo Ulivi, 2017. "Ice XVII as a Novel Material for Hydrogen Storage," Challenges, MDPI, vol. 8(1), pages 1-13, February.

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