Thermodynamic Properties of Natural Cuspidine

The paper reports pioneering data on the calorimetrically determined enthalpy of formation from elements of cuspidine, Ca fluordiorthosilicate Ca 4 Si 2 O 7 F 2 , from the Tyrny-Auz Mo–W deposit in Kabardino- Balkaria, Russia. The data were obtained by high-temperature melt solution calorimetry. The...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Geochemistry international 2018-08, Vol.56 (8), p.865-869
Hauptverfasser:	Ogorodova, L. P., Vigasina, M. F., Kononov, O. V., Koshlyakova, N. N., Ksenofontov, D. A., Khanin, D. A., Shcherbakov, V. D., Mel’chakova, L. V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Calorimetry Earth and Environmental Science Earth Sciences Enthalpy Geochemistry Heat measurement High temperature Short Communications Thermal properties Thermodynamic properties Thermodynamics Volcanic ash, tuff, etc Volcanoes
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The paper reports pioneering data on the calorimetrically determined enthalpy of formation from elements of cuspidine, Ca fluordiorthosilicate Ca 4 Si 2 O 7 F 2 , from the Tyrny-Auz Mo–W deposit in Kabardino- Balkaria, Russia. The data were obtained by high-temperature melt solution calorimetry. The determined value is Δ f H el ° (298.15 K) =–5190 ± 13 kJ/mol. The paper reports estimated S°(298.15 K) and Δ f G el ° (298.15 K) of cuspidine.
ISSN:	0016-7029 1556-1968
DOI:	10.1134/S0016702918080098