Patryk Zaleski-Ejgierd

TL;DR: Experimental evidence is presented that the threshold pressure of ~120 GPa induces in molecular ammonia the process of autoionization to yet experimentally unknown ionic compound--ammonium amide, opening new possibilities for studying molecular interactions in hydrogen-bonded systems.

TL;DR: A significant number of enthalpically near-degenerate structures, with exceedingly small energy barriers for distortions, and characteristic instabilities in the phonon spectra suggest that even at very high pressures PbH4 may exhibit both metallic and liquidlike properties and sublattice or even full melting.

TL;DR: In this theoretical study, in contrast to experiment, it is found that the ambient pressure molecular structure of xenon difluoride, of I4/mmm symmetry, remains the most stable one up to 105 GPa.

TL;DR: Though a better preparation and characterization of WH resulted, no higher hydrides have as yet been found, and experiments were then undertaken to seek phases other than WH, exploring a variety of experimental conditions that would favor further reaction.

TL;DR: In this paper, the existence of thermodynamically stable krypton oxides at high pressure was predicted using modern ab-initio evolutionary algorithms in combination with density functional theory, and the results indicated that at approximately 300 GPa the monoxide, KrO, should form spontaneously and remain thermo-and dynamically stable with respect to constituent elements and higher oxides.