Pressure induced orientational glass phase in molecular para-hydrogen
  We 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. 
T.I. Schelkacheva, E.E. Tareyeva, and N.M. Chtchelkatchev