Conductivity and real structure of cesium hydrosulphosphate crystals

Superproton crystals obtained in the water-salt system CsHSO4–CsH2PO4–H2O were studied using electric atomic force microscopy. At 296 K for the Cs3(HSO4)2(H2PO4) and Cs4(HSO4)3(H2PO4) samples, local current-voltage characteristics were measured depending on the crystallographic orientation, the anisotropy of conductivity was established, and the degree of dependence of the conductive properties on the composition of the compounds was shown. Twin structures on cleavage fractures and their correlation with the atomic structure of monoclinic crystals are considered. The common features and differences in the atomic and real structure of mixed crystalline phases and the influence of hydrogen subsystems on their properties are discussed.