  We investigate pressure-induced structural changes to the Peierls-type
distorted low-temperature phase of the low-dimensional Sc$_3$CoC$_4$ as a
possible origin of its pressure-enhanced superconductivity. By means of
cryogenic high-pressure x-ray diffraction experiments we could reveal subtle,
but significant structural differences between the low-temperature phase at
ambient and elevated pressures. We could thus establish the structure of the
superconducting phase of the title compound which interestingly still shows the
main features of the Peierls-type distorted low-temperature phase. This
indicates that in contrast to other low-dimensional materials a suppression of
periodic structural distortions is no prerequisite for superconducitivity in
the transition metal carbide.
