Email this article Calorimetric Study of Natural Basic Copper Phosphate—Pseudomalachite
- Authors: Ogorodova L.P.1, Melchakova L.V.1, Vigasina M.F.1, Gritsenko Y.D.1, Ksenofontov D.A.1
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Affiliations:
- Geological Faculty
- Issue: Vol 56, No 5 (2018)
- Pages: 484-487
- Section: Short Communications
- URL: https://journals.rcsi.science/0016-7029/article/view/155946
- DOI: https://doi.org/10.1134/S001670291805004X
- ID: 155946
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Abstract
The thermochemical study of a natural basic copper phosphate, pseudomalachite Cu5(PO4)2(OH)4 (Virneberg deposit, Germany), was carried out using high-temperature melt solution calorimetry method with a Tian–Calvet microcalorimeter. The enthalpy of formation of the mineral from elements was obtained to be ΔfHel(298.15 K) =–3214 ± 13 kJ/mol. The value of the Gibbs energy of pseudomalachite formation calculated using literature data on its standard entropy is ΔfHel°(298.15 K) =–2812 ± 13 kJ/mol.
About the authors
L. P. Ogorodova
Geological Faculty
Author for correspondence.
Email: logor@geol.msu.ru
Russian Federation, Moscow, 119991
L. V. Melchakova
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
Yu. D. Gritsenko
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
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