Thermal behaviour of some minerals - Differential thermal analysis and determination of PA curves for different heating rates

Thermal behaviour of some minerals (kaolinite, halloysite, two montmorillonites, quartz and calcite) for different sample amounts and heating rates has been investigated using differential thermal analysis. On the basis of the DTA analysis carried out, the PA curves of each mineral have been obtained for different heating rates. These diagrams can be employed in the semiquantitative evaluation of identical substances contained in uncharacterized polymineral samples. © 1988 Wiley Heyden Ltd. and Akadémiai Kiadó.