Figure 3
Lattice parameters of BaP polymorphs as a function of pressure up to 27.9 GPa. Lattice parameters (a) a, (b) b, (c) c and (d) β are designated in the y axes for the structures of BaP-I and BaP-II. For the triclinic structure of BaP-III the corresponding lattice parameters are given in brackets in the legend. (As the α and β angles in the triclinic structure of BaP-III are very close to 90°, then b of BaP-I and BaP-II corresponds to c in BaP-III and vice versa, while β corresponds to γ in BaP-III). Green solid triangles – BaP-I, red inversed solid triangles – BaP-II and blue solid circles – BaP-III. |