Crystal ordering by structural defects

Based on calculations of activation process parameters for gold, it is shown that if the energy required to create a defect (vacancy or diffusing atom) is less than a certain value $(h_i<h_{si})$, or the resulting defect has a volume less than a certain value $(v_i<v_{si})$, then this defect has negative entropy, i. e. this defect orders the crystal. The changes in the functions of $h_{si}$ and $v_{si}$ with increasing pressure has been studied.