Thermochemical study of Mg–Fe chlorites


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The thermochemical study of two natural trioctahedral Mg–Fe chlorites—clinochlores was carried out using high-temperature melt solution calorimetry with a Tian–Calvet microcalorimeter. The enthalpies of formation of clinochlores of compositions (Mg4.9Fe0.32+Al0.8)[Si3.2Al0.8O10](OH)8 (–8811 ± 12 kJ/mol) and (Mg4.3Fe0.72+Al1.0)[Si3.0Al1.0O10](OH)8 (–8696 ± 13 kJ/mol) from elements were determined. The values of the standard entropies and the Gibbs energies of formation of the studied natural minerals as well as thermodynamic properties of Mg–Fe chlorites of theoretical composition were estimated.

Sobre autores

L. Ogorodova

Geological Faculty

Autor responsável pela correspondência
Email: logor@geol.msu.ru
Rússia, Moscow, 119991

L. Mel’chakova

Geological Faculty

Email: logor@geol.msu.ru
Rússia, Moscow, 119991

M. Vigasina

Geological Faculty

Email: logor@geol.msu.ru
Rússia, Moscow, 119991

I. Kiseleva

Geological Faculty

Email: logor@geol.msu.ru
Rússia, Moscow, 119991

I. Bryzgalov

Geological Faculty

Email: logor@geol.msu.ru
Rússia, Moscow, 119991

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