Structural phase transition in ReO3 under high pressure

Structural phase transitions in ReO3 were studied under high pressure with the angle-dispersive x-ray diffraction method using synchrotron radiation. The pressure range of 8-18 GPa was clarified to be the coexistence region of the cubic phase and rhombohedral I phase. In addition, the apparent change of diffraction pattern observed above 38 GPa defined the unit cell of the rhombohedral II phase. (Some figures in this article are in colour only in the electronic version).