Abstract
Slickensides and fissures in a fresh outcrop of silicified limestones at the Bürgenstock (Switzerland) contained palygorskite. According to TG, DTA and heating X-ray experiments, dehydration of the palygorskite took place in four steps. Each step clearly showed an alteration in the unit cell dimensions. Exothermic reactions which occur at higher temperatures resulted in the formation of a Mg-Al- silicate high phase together with some clinoenstatite and the formation of β- cristobalite with some cordierite, respectively.
Published Version
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