Caesium hexafluorocobaltate(IV) is a salt with the chemical formula . It can be synthesized by the reaction of and fluorine. The salt contains rare example of cobalt(IV) complex, i.e. [CoF<sub>6</sub>]<sup>2-</sup>.
It has cubic K<sub>2</sub>PtCl<sub>6</sub> structure, with the lattice constant a = 8.91 ÃÂ , and the length of Co-F bond is 1.73 ÃÂ . The complex is ferromagnetic and the ground state of Co(IV) is T<sub>2g</sub><sup>3</sup>E<sub>g</sub><sup>2</sup>.