Phase transitions in surface layers of hydrosulfate crystals
Baranov A. I. , Sinitsyn V. V., Ponyatovskii E. G., Shuvalov L. A.
The surface layers of certain alkali hydrosulfate single crystals undergo phase transitions which are accompanied by appreciable anomalies of the surface conductivity. In CsHS04 and CsDS04 these transitions precede a volume transition to the superionic state and in NH4HS04 and RbHS04 they precede their melting.