Fig. 4.

P-V relations for Ce₃Al up to 40 GPa. The high-pressure volumes of α-Ce₃Al (red squares) and fcc alloy (blue squares) were determined in the present study by in situ XRD during pressure increase and release. The dashed curves are (3V_γ-Ce + V_Al) and (3V_α-Ce + V_Al) at pressures < and >1 GPa, respectively, calculated by using results from the volumes for pure Ce (V_Ce) (29) and pure Al (V_Al) (30). (Inset) Expanded P-V plot up to 3 GPa; recent high-precision data of V_Ce from ref. 28 were used to calculate the black triangles.