Zur Thermodynamik der Metallcarbonate. 2. Mitteilung [1]. Löslichkeitskonstanten und Freie Bildungsenthalpien von Cu2(OH)2CO3 (Malachit) und Cu3(OH)2(CO3)2 (Azurit) bei 25°C |
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| Authors: | P Schindler M Reinert H Gamsjäger |
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| Institution: | Institut für anorganische, analytische und physikalische Chemie der Universität Bern |
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| Abstract: | The solubilities of Cu2(OH)2CO3 (malachite) and Cu3(OH)2(CO3)2 (azurite) have been studied at 25° C in solutions of the constant ionic strength 0,2 M consisting primarily of sodium perchlorate. From experimental data the following values for equilibrium constants and Gibbs energies of formation are deduced:  Predominance area diagrams for the ternary system Cu2+? H2O-CO2(g), including CuO, Cu(OH)2, Cu2(OH)2CO3, Cu3(OH)2(CO3)2, Cu2+ and Cu (CO3)22?, are given. |
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