Freyer,Voigt,Bottge: The Thermal Stability of Tachhydrite and Carnallite

摘要

The thermal stability of Tachhydrite and Carnallite represents a Special problem in respect to the establishment of long term stable drift sealing Systems in carnallite locations containing tachhydrite.Heat developing building and sealing materials can cause dissolution corrosion of the carnallite/tachhy-drite rocks when no precautions concerning the humidity were taken.With the development of a thermodynamic model based on the PITZER equations the tem-perature dependent compatibil-ity of tachhydrite and carnallite with humidity can be calculated between 25 deg C and 110 deg C.