Na₂ZnCl₄ (NZC) crystallizes in the Pnma space group without exhibiting any polymorphic behavior. The structure of NZC is shown in Figure , as confirmed by XRD (Figure ). Interestingly, the olivine-type structure is the same as the well-studied LiFePO₄ (LFP) positive electrode material. Like the metal cations Li + and Fe 2+ in LFP, in NZC the Na⁺ is coordinated by six Cl⁻ ions to form an octahedron. Na1 occupies the Wyckoff 4a site located at the corner of the unit cell, corresponding to the Li⁺ site in the LFP structure. Na2 resides at the Wyckoff 4c site, which corresponds to the Fe²⁺ site in LFP. Both Na1 and Na2 polyhedra form sublattices in the bc-plane, stacking in an ABAB pattern (hexagonal close packing of the anions). The Na1 octahedra are connected through edge-sharing, and the chain along the [010] direction is shown in Figure . Furthermore, ZnCl₄²⁻ tetrahedra are located between these chains in the Na1 sublattice, connecting them by corner-sharing. The Na2 sublayer is built exclusively of corner-shared Na2 octahedra.