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- Title
Thermodynamic Properties of Natural Cuspidine.
- Authors
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.
- Abstract
The paper reports pioneering data on the calorimetrically determined enthalpy of formation from elements of cuspidine, Ca fluordiorthosilicate Ca4Si2O7F2, 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 ΔfHel° (298.15 K) =-5190 ± 13 kJ/mol. The paper reports estimated S°(298.15 K) and ΔfGel° (298.15 K) of cuspidine.
- Subjects
MINERALS; THERMODYNAMICS; ENTHALPY; CALORIMETRY; THERMOCHEMISTRY
- Publication
Geochemistry International, 2018, Vol 56, Issue 8, p865
- ISSN
0016-7029
- Publication type
Article
- DOI
10.1134/S0016702918080098