Fig. 5

Pressure-volume data for i-Al₆₄Cu₂₃Fe₁₃ from this study (black circles) and Takagi et al. (2015; empty circles) fitted using both a Murnaghan (black dotted line) and Birch-Murnaghan EOS (dashed green line). Our fit is compared with previous studies by Sadoc et al. (1994) and Lefebvre et al. (1995) both for icosahedral Al₆₂Cu_25.5Fe_12.5 and for one approximant phase with composition Al₆₄Cu₂₄Fe₁₂ (Lefebvre et al. 1995). The curves obtained from these previous studies are extrapolated up to 104 GPa assuming that no structural phase transformation occurs