“…Fig. 5 shows a summary of vacancy formation enthalpy values from very many research studies [39,40,[42][43][44]46,48,49,[60][61][62][63][64][65][66][67] as a function of Al content. Data has here been separated into three domains, following the ideas of Hehenkamp and workers [63,65], and according to the phase diagam proposed by Kubaschewski [68].…”