X-ray Powder Diffraction Structure of Triclinic C₆₀Br₂₄(Br₂)₂

This paper reports the results of X-ray powder diffraction experiments on C₆₀Br₂₄(Br₂)₂. This material is a C₆₀ derivative and shows rhombohedral symmetry at room temperature. At low temperature, a rhombohedral-to-triclinic phase transition can be observed that involves a large distortion of the cell while the volume of the unit cell remains almost constant. This is a sufficiently complicated system that high-resolution synchrotron data and a combination of different tactics were required to reach a structure solution.