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- Title
Calorimetric Study of Natural Basic Copper Phosphate—Pseudomalachite.
- Authors
Ogorodova, L. P.; Melchakova, L. V.; Vigasina, M. F.; Gritsenko, Yu. D.; Ksenofontov, D. A.
- 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 Δ<italic>f</italic><italic>H</italic>el(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 Δ<italic>f</italic><italic>H</italic>el°(298.15 K) =-2812 ± 13 kJ/mol.
- Subjects
CALORIMETRY; COPPER phosphate; ENTHALPY; GEOCHEMISTRY; GIBBS' energy diagram
- Publication
Geochemistry International, 2018, Vol 56, Issue 5, p484
- ISSN
0016-7029
- Publication type
Article
- DOI
10.1134/S001670291805004X