Comment on "Observation of the Wigner-Huntington transition to metallic hydrogen".

Xiao-Di Liu Philip Dalladay-SimpsonRoss T HowieBing Li Eugene Gregoryanz

Published in: Science (New York, N.Y.) (2017)

Dias and Silvera (Research Article, 17 February 2017, p. 715) claim the observation of the Wigner-Huntington transition to metallic hydrogen at 495 gigapascals. We show that neither the claims of the record pressure nor the phase transition to a metallic state are supported by data and that the data contradict the authors' own unconfirmed previous results.

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