Figure 2. Isobaric volumes of Fe₃Pt at four pressures.

The volume (V) is normalized to its equilibrium volume (V_N) at atmospheric pressure and room temperature. The predicted NTE regions are illustrated by the pink open diamonds¹³. Measured variation of volume at ambient pressure by Sumiyama et al.¹⁴ is also shown for comparison. The shaded area represents the miscibility gap similar to that in Fig. 1 with the critical point marked by the green open circle.