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The thermodynamics of arsenates, selenites, and sulfates in the oxidation zone of sulfide ores. XI. Solubility of synthetic chalcomenite analog and zinc selenite at 25°C

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Abstract

The aim of this study is the synthesis of CuSeO3·2H2O (chalcomenite analog), ZnSeO3·2H2O, and ZnSeO3·H2O and the investigation of their solubility in water. CuSeO3·2H2O has been synthesized from solutions of Cu nitrate and Na selenite, while Zn selenites were synthesized from solutions of Zn nitrate and Na selenite. The samples obtained have been examined with X-ray diffraction and infrared and Raman spectroscopy. The solubility has been determined using the isothermal saturation method in ampoules at 25°C. The solubility has been calculated using the Geochemist’s Workbench (GMB 9.0) software package. Solubility products have been calculated for CuSeO3·2H2O (10–10.63), ZnSeO3·2H2O (10–8.35), and ZnSeO3·H2O (10–7.96). The database used comprises thermodynamic characteristics of 46 elements, 47 base particles, 48 redox pairs, 551 particles in solution, and 624 solid phases. The Eh–pH diagrams of the Zn–Se–H2O and Cu–Se–H2O systems were plotted for the average contents of these elements in underground water in oxidation zones of sulfide deposits.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia

    M. V. Charykova, V. G. Krivovichev, N. M. Ivanova & V. V. Semenova

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  1. M. V. Charykova
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  2. V. G. Krivovichev
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  3. N. M. Ivanova
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  4. V. V. Semenova
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Correspondence to M. V. Charykova.

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Original Russian Text © M.V. Charykova, V.G. Krivovichev, N.M. Ivanova, V.V. Semenova, 2015, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2015, No. 1, pp. 70–80.

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Charykova, M.V., Krivovichev, V.G., Ivanova, N.M. et al. The thermodynamics of arsenates, selenites, and sulfates in the oxidation zone of sulfide ores. XI. Solubility of synthetic chalcomenite analog and zinc selenite at 25°C. Geol. Ore Deposits 57, 691–698 (2015). https://doi.org/10.1134/S1075701515080036

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