Figure 6
From: New high-pressure van der Waals compound Kr(H2)4 discovered in the krypton-hydrogen binary system
Pressure dependence of the H2 vibrons of Kr(H2)4 and surrounding solid H2 (cyan).
Errors in frequency and pressure are within the size of the symbol. The data is well represented with 2nd and 3rd order polynomials (Supplementary Tab. S3). The pressure dependence of the vibron of solid hydrogen agrees well with literature values (dotted grey line22; solid grey line23). The pressure dependence of the vibron of Ar(H2)210 and the most intense vibron of Xe(H2)8 are given for comparison. The latter matches the data by Somayazulu et al. (2010). The inset shows the pressure dependence of the most intense Xe(H2)8 vibron and the Q1(1) vibron from the surrounding, bulk H2 zoomed out to 142 GPa.
