  We report a pressure-induced phase transition in the frustrated kagom\'e
material jarosite at ~45 GPa, which leads to the disappearance of magnetic
order. Using a suite of experimental techniques, we characterize the
structural, electronic, and magnetic changes in jarosite through this phase
transition. Synchrotron powder X-ray diffraction and Fourier transform infrared
spectroscopy experiments, analyzed in aggregate with the results from density
functional theory calculations, indicate that the material changes from a R-3m
structure to a structure with a R-3c space group. The resulting phase features
a rare twisted kagom\'e lattice in which the integrity of the equilateral Fe3+
triangles persists. Based on symmetry arguments we hypothesize that the
resulting structural changes alter the magnetic interactions to favor a
possible quantum paramagnetic phase at high pressure.
