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Structures of CuxTiS2 (left) and AgCrSe2 (right). Both structures can be described as a stacking of CdI2-type layers, TiS2 or CrSe2 (Ti or Cr cations are at the centers of the green octahedra), with Cu cation in the van der Waals spacing (blue octahedra) or Ag in tetrahedral coordination (blue tetrahedra), respectively.
