Journal Article

PUBDB-2022-04010

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Formation and Stability of Dense Methane-Hydrogen Compounds

Ranieri, U.Extern* ; Conway, L. J. ; Donnelly, M.-E.Extern* ; Hu, H. ; Wang, M.Extern* ; Dalladay-Simpson, P.Extern* ; Peña-Alvarez, M. ; Gregoryanz, E.Extern* ; Hermann, A. ; Howie, R. (Corresponding author)Extern*

2022
APS College Park, Md.

This record in other databases:        

Please use a persistent id in citations: doi:10.1103/PhysRevLett.128.215702  doi:10.3204/PUBDB-2022-04010

Abstract: Through a series of x-ray diffraction, optical spectroscopy diamond anvil cell experiments, combined with density functional theory calculations, we explore the dense CH$_4$−H$_2$ system. We find that pressures as low as 4.8 GPa can stabilize CH$_4$(H$_2$)$_2$ and (CH$_4$)$_2$H$_2$, with the latter exhibiting extreme hardening of the intramolecular vibrational mode of H$_2$ units within the structure. On further compression, a unique structural composition, (CH$_4$)$_3$(H$_2$)$_{25}$, emerges. This novel structure holds a vast amount of molecular hydrogen and represents the first compound to surpass 50 wt % H$_2$. These compounds, stabilized by nuclear quantum effects, persist over a broad pressure regime, exceeding 160 GPa

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P02.2 (PETRA III)

Appears in the scientific report 2022

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---