Electrical conductivity and crystal structure of piperazinium 10-silver 12-iodide·4-dimethylformamide

Crystals of (C₄N₂H₁₂)Ag₁₀I₁₂·4C₃H₇NO contain channels formed by face-sharing iodide tetrahedra. These channels, parallel to the monoclinic $\text{c}$-axis, are isolated from each other by the (C₄N₂H₁₂)²⁺ ions and C₃H₇NO molecules. Electrical measurements along the $\text{c}$-axis of the crystals at 200 psig (argon) indicate that the material does not become a true solid electrolyte below 332 K, the decomposition temperature. Structural considerations show that despite the substantial ratio (3:1) of sites to Ag⁺ ions, the material is not expected to become a solid electrolyte, if it retains its room temperature structure, at any temperature or pressure.