2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/225695We propose a theoretical description of possible orientational glass transition in solid molecular para-hydrogen and ortho-deuterium under pressure supposing that they are mixtures of J=0 and J=2 states of molecules. The theory uses the basic concepts and methods of standard spin-glass theory. We expect our orientational glass to correspond the II' phase of the high pressure hydrogen phase diagram.Disordered Systems and Neural NetworksStatistical Mechanicstext