Within the nearly-linear energy-density relationship among the lowest energy structures with each degree of interpenetration, the predicted 4-fold interpenetrated structure is particularly stable, being located just 10.4 kJ/mol above the global minimum predicted 5-fold interpenetrated structure (and 4.8 kJ/mol above the Figure . PXRD pattern map for ADTA from 228 crystallization conditions. red = 5-fold, maroon = 4/5-fold mixture, orange = 4fold, green = 3-fold, a = amorphous phase. The 41 crystallization conditions that could not be identified as one, or a mixture, of these phases, based on their PXRD patterns, are starred. Of these 41 conditions, we determined 2-fold crystal structures for the 3 crystallizations highlighted in blue.