%0 Journal Article
%A Wang, Yu
%A Glazyrin, Konstantin
%A Roizen, Valery
%A Oganov, Artem R.
%A Chernyshov, Ivan
%A Zhang, Xiao
%A Greenberg, Eran
%A Prakapenka, Vitali B.
%A Yang, Xue
%A Jiang, Shu-qing
%A Goncharov, Alexander F.
%T Novel Hydrogen Clathrate Hydrate
%J Physical review letters
%V 125
%N 25
%@ 1079-7114
%C College Park, Md.
%I APS
%M PUBDB-2021-01434
%P 255702
%D 2020
%X We report a new hydrogen clathrate hydrate synthesized at 1.2 GPa and 298 K documented by single-crystal x-ray diffraction, Raman spectroscopy, and first-principles calculations. The oxygen sublattice ofthe new clathrate hydrate matches that of ice II, while hydrogen molecules are in the ring cavities, whichresults in the trigonal R3c or R ―3c  space group (proton ordered or disordered, respectively) and thecomposition of ðH<sub>2</sub> OÞ<sub>6</sub> H<sub>2</sub>. Raman spectroscopy and theoretical calculations reveal a hydrogen disorderednature of the new phase C0<sub>1</sub>, distinct from the well-known orderedC1clathrate, to which this new structuretransforms upon compression and/or cooling. This new clathrate phase can be viewed as a realization of adisordered ice II, unobserved before, in contrast to all other ordered ice structures.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:33416341
%U <Go to ISI:>//WOS:000600286000015
%R 10.1103/PhysRevLett.125.255702
%U https://bib-pubdb1.desy.de/record/456283