Pressure, a fundamental thermodynamic variable, can generate two essential effects on
materials. First, pressure can create new high-pressure phases via modification of the …

Studies of the Earth's atmosphere have shown that more than 90% of the expected amount
of Xe is depleted, a finding often referred to as the 'missing Xe paradox'. Although several …

Crystal structure prediction at high pressures unbiased by any prior known structure
information has recently become a topic of considerable interest. We here present a short …

The noble gases are the most inert group of the periodic table, but their reactivity increases
with pressure. Diamond-anvil-cell experiments and ab initio modelling have been used to …

The knowledge of the structures that can exist in compounds containing helium is of interest
for understanding the conditions where and if this inert element can form structures where …

Until very recently, helium had remained the last naturally occurring element that was known
not to form stable solid compounds. Here we propose and demonstrate that there is a …

At high pressure, the typical behavior of elements dictated by the periodic table—including
oxidation numbers, stoichiometries in compounds, and reactivity, to name but a few—is …

Using in situ synchrotron x-ray diffraction and Raman spectroscopy in concert with first
principles calculations we demonstrate the synthesis of stable Xe (Fe, Fe/Ni) 3 and XeNi 3 …

Noble gas elements exhibit chemical reactivity under high pressure, forming novel
compounds through reactions with other substances, which has become a recent focus in …

It has long been recognized that the valence electrons of an atom dominate the chemical
properties, while the inner-shell electrons or outer empty orbital do not participate in …