Thermal decomposition of portlandite and xonotlite to high pressures and temperatures

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Abstract
"The phase boundary for the thermal dehydration of portlandite has been determined to a pressure of 20 kilobars. The present curve connects smoothly with the previous hydrostatic curve to 3 kilobars. The reaction xonotlite <--> wollastonite + vapor has been studied to 50 kilobars. At pressures above 20 kilobars xonotlite converts to a form that is possibly a polymorph of xonotlite. It was not possible to rehydrate wollastonite."

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