Heat capacity and thermodynamic properties of alkali and alkali-earth borohydrides

Publication date: Available online 10 January 2020Source: The Journal of Chemical ThermodynamicsAuthor(s): Erika M. Dematteis, Steffen R. Jensen, Torben R. Jensen, Marcello BariccoAbstractIn this work, the above room temperature heat capacity for different polymorphs of alkali and alkali-earth (i.e. Na, K, Rb, Cs, Mg, Ca) borohydrides has been measured by DSC as a function of temperature. The above room temperature measured Cp values have been compared with available extrapolated literature data, and they have been modelled as a function of temperature according to the Calphad method. The variations of Cp values for different polymorphs were studied in details and they have been related to the corresponding crystal structures, considering the mobility of the BH4- group. From the whole set of assessed thermodynamic data, possible correlations with dynamics and structural properties have been estimated.

Source: The Journal of Chemical Thermodynamics - January 11, 2020 Category: Chemistry Source Type: research