Thermodynamic properties of anhydrous smectite MX-80, illite IMt-2 and mixed-layer illite–smectite ISCz-1 as determined by calorimetric methods. Part I: Heat capacities, heat contents and entropies

ThermoChimie database developments in the framework of cement/clay interactions

“…Calorimetric measurements are described in detail in Gailhanou et al (2007Gailhanou et al ( , 2009Gailhanou et al ( , 2012Gailhanou et al ( and 2013 and Blanc et al (2014a). A compilation of the measured thermodynamic properties is provided in Table 1.…”

Modelling CO2-induced fluid–rock interactions in the Altensalzwedel gas reservoir. Part I: from experimental data to a reference geochemical model

“…1.2 Mineralogical composition of host rock from core samples 1 AVAILABLE DATA Gailhanou et al (2007) 3 Other mineral phases are principally mafic and volcanic lithoclasts, FeTi-oxides, other clay minerals and REE-enriched carbonates Table (2) summarizes the average mineralogical composition of the analized samples, aggregated per lithotype and alteration state. Only about 10% of the samples taken from the aeolian sandstone were red (unbleached); in contrast, the proportion of red and grey samples for the aquatic/fluvial lithotype is 1:1.…”

“…Among the mineral phases listed in table (2), an averaged assemblage consisting of K-feldspar, albite, Fe-bearing illite (thermodynamic data from Gailhanou et al (2007)), hematite, and a pore-filling cementation constituted by calcite and anhydrite was found to match the hypothesis of equilibrium with the formation fluid, and was therefore taken as initial state for the geochemical modelling. Such assemblage of primary mineral phases is common to both lithotypes and, to a certain extent, to their alteration state.…”

Thermo-Analytical Techniques on MX-80 Montmorillonite: A Way to Know the Behavior of Water and its Thermodynamic Properties during Hydration –Dehydration Processes

“…However, there is insufficient knowledge of the hydration-dehydration mechanism for smectite / water or, more specifically, the structural and thermodynamic features of smectites as a function of hydration. Gailhanou et al [16,17] have studied the standard enthalpy of formation (∆ f H 0 ), entropy (S 0 ), and heat capacity of smectite MX-80, illite IMt-2, and illite/smectite ISCz-1 using lowtemperature adiabatic calorimetry for both the hydrated and anhydrous phases. Nevertheless, this previous set of thermodynamic properties is incomplete, and no data can be found in the literature describing the dehydration enthalpies corresponding to the different stages of hydration of the entire alkali series of homoionic montmorillonites.…”