Pressure-induced anomalies and structural instability in compressed β-Sb2O3

Here, we have discovered a new high-pressure phase of Sb₂O₃, and reported pressure-induced anomalies in orthorhombic β-Sb₂O₃ (valentinite) by the combination of synchrotron in situ X-ray diffraction and first-principles theoretical calculations up to 40.5 GPa.