Figure 2
From: Pressure-induced high-spin/low-spin disproportionated state in the Mott insulator FeBO3
Pressure dependencies of the unit-cell volume divided by Z unit formulas (Z = 6 and 4 for the \(R\overline{3}\mathrm{c }\) and C2/c phases, respectively) (a), determined in the powder and single crystal XRD studies; FeO6 octahedral volume (b) and average Fe–O, B-O distances (c) for FeBO3. The solid, dashed, dash-dot and short-dash lines in (a) are fits with the Birch-Murnaghan equation of state (see text). The panel (b) insets show the \(R\overline{3}\mathrm{c }\) and C2/c crystal structures, respectively. The red and green spheres correspond to the oxygen and boron atoms.
