Pentasupertetrahedral Clusters as Building Blocks for a Three‐Dimensional Sulfide Superlattice

Highly mobile extra-framework cations encapsulated in the 3D open-framework architecture of ICF-26 result in remarkably high ion conductivity. The framework is composed of Li4In22S4418− clusters, which represent the second member of a series of pentasupertetrahedral clusters Pn. The P2 cluster reported here is the largest member of the Pn series so far. In the crystal, each P2 cluster shares all four corners with adjacent P2 clusters (see picture).