2019/07/31 by Takahiro Matsuoka, T. Matsuoka, Shu Muraoka +9
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Advanced Chemical Physics Studies #Analytical Chemistry (journal) #Chemistry #Crystallography #Crystallography and molecular interactions #Diffraction #High-pressure geophysics and materials #Hydrogen #Lattice (music) #Materials science #Molecule #Optics #Organic chemistry #Phase (matter) #Physics #Raman scattering #Raman spectroscopy #Scattering #Stacking #cond-mat.mtrl-sci #physics.chem-ph
paper · pdf · doi:10.1021/acs.jpcc.9b06639
openalex created_date 2019/07/23 · arxiv created 2019/08/29 · openalex publication_date 2019/09/26 · arxiv updated 2019/09/30 · openalex updated_date 2026/08/05
X-ray diffraction and Raman scattering measurements, and first-principles calculations are performed to search for the formation of a NaCl–hydrogen compound. When the NaCl and H 2 mixture is laser-heated to above 1500 K at pressures exceeding 40 GPa, we observe the formation of NaClH x with P 6 3 / mmc structure which accommodates H 2 molecules in the interstitial sites of the NaCl lattice forming ABAC stacking. Upon the decrease of pressure at 300 K, NaClH x remains stable down to 17 GPa. Our calculations suggest the observed NaClH x is NaCl(H 2 ). In addition, a hydrogen-richer phase NaCl(H 2 ) 4 is predicted to become stable at pressures above 40 GPa.