Electronic instabilities in low-dimensional solid-state materials are paramount in understanding the physics of electron-electron interactions. Charge density wave (CDW) order, an electronic distortion of conduction electrons in a solid-state lattice, are a result of such effects. Solid-state structures where lanthanide atoms are placed in high symmetry “cages” are known for their electronic instabilities, leading to CDW and superconducting behavior. The individual cages act as an analogue to coordination chemistry, where the symmetry of each cage can predict the electron filling of the magnetic electrons. By synthesizing these cage structures and tuning their symmetry using solid-state chemistry, we will gain a deeper understanding of electronic instabilities in extended solids.