On the solid–solid phase diagrams of Ar–O2 and Ar–N2 mixtures

Abstract
The growth of large single crystals of Ar–O2 and Ar–N2 alloys is reported. The crystals were formed under near or quasiequilibrium conditions and it was found that minimum solute concentrations of about 4 1/2% (N2) and 5% (O2) were required in order to produce the hcp phase. Lower concentrations resulted in the fcc phase.