Structure of ReO3above the "compressibility collapse" transition

We have determined the crystal structure of Re${\mathrm{O}}_3$ at ∼ 15 kbar and 300 K well above the "compressibility collapse" transition (5.2 kbar, 300 K) with the use of the single-crystal diffractometer at the Los Alamos Pulsed Neutron Facility. Our data are consistent with space group $\mathrm{Im}3\mathrm{}$ and $a=7.41\mathrm{}\left(2\right)\mathrm{}$ Å. A model was refined to an $R\left(F\right)\mathrm{}$ value of 0.12. The octahedra are slightly rotated moving the oxygen atoms so as to form a 165° Re-O-Re angle. This structural model is consistent with a large body of recent physical data.