The high-pressure structural behavior of the noble gas (Ng) clathrate hydrates $\mathrm{Ar}\ifmmode\cdot\else\textperiodcentered\fi{}6.5\phantom{\rule{0.16em}{0ex}}{\mathrm{H}}_{2}\mathrm{O}$ and $\mathrm{Xe}\ifmmode\cdot\else\textperiodcentered\fi{}7.2\phantom{\rule{0.16em}{0ex}}{\mathrm{H}}_{2}\mathrm{O}$ featuring cubic structures II I, respectively, was investigated by neutron powder diffra...

Spectroscopy of alkali-buffer gas mixtures at high pressures from single-digit to several 100 bars in the regime substantial collisional broadening is relevant a wide range fields, ranging redistribution cooling laboratory astrophysics. Here we report on spectroscopic measurements dense rubidium-noble recorded pressure cell equipped with soldered sapphire optical viewports, which allows for con...