Email this article Thermochemical study Mg–Fe amphiboles
- Authors: Ogorodova L.P.1, Kiseleva I.A.1, Vigasina M.F.1, Mel’chakova L.V.1, Ksenofontov D.A.1, Bryzgalov I.A.1
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Affiliations:
- Geological Faculty
- Issue: Vol 55, No 7 (2017)
- Pages: 669-673
- Section: Short Communications
- URL: https://journals.rcsi.science/0016-7029/article/view/155544
- DOI: https://doi.org/10.1134/S0016702917070084
- ID: 155544
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Abstract
The paper presents data on the thermochemical study (high-temperature melt calorimetry in a Tian–Calvet microcalorometer) of two natural Mg–Fe amphiboles: anthophyllite Mg2.0(Mg4.8Fe0.22+)[Si8.0O22](OH)2 from Kukh-i-Lal, southwestern Pamirs, Tajikistan, and gedrite Na0.4Mg2.0(Mg1.7Fe0.22+Al1.3)[Si6.3Al1.7O22](OH)2 from the Kola Peninsula, Russia. The enthalpy of formation from elements is obtained as–12021 ± 20 kJ/mol for anthophyllite and as–11545 ± 12 kJ/mol for gedrite. The standard entropy, enthalpy, and Gibbs energy of formation are evaluated for Mg–Fe amphiboles of theoretical composition.
About the authors
L. P. Ogorodova
Geological Faculty
Author for correspondence.
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
I. A. Kiseleva
Geological Faculty
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
M. F. Vigasina
Geological Faculty
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
L. V. Mel’chakova
Geological Faculty
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
D. A. Ksenofontov
Geological Faculty
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
I. A. Bryzgalov
Geological Faculty
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
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