  The Kagome lattice is an important fundamental structure in condensed matter
physics for investigating the interplay of electron correlation, topology, and
frustrated magnetism. Recent work on Kagome metals in the AV3Sb5 (A = K, Rb,
Cs) family, has shown a multitude of correlation-driven distortions, including
symmetry breaking charge density waves and nematic superconductivity at low
temperatures. Here we study the new Kagome metal Yb0.5Co3Ge3 and find a
temperature-dependent kink in the resistivity that is highly similar to the
AV3Sb5 behavior and is commensurate with an in-plane structural distortion of
the Co Kagome lattice along with a doubling of the c-axis. The space group is
found to lower from P6/mmm to P63/m below the transition temperature, breaking
the in-plane mirror planes and C6 rotation, while gaining a screw axis along
the c-direction. At very low temperatures, anisotropic negative
magnetoresistance is observed, which may be related to anisotropic magnetism.
This raises questions about the types of the distortions in Kagome nets and
their resulting physical properties including superconductivity and magnetism.
