naa a22 4500 510736203 CHVBK 20180411092754.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1134/S1075701513070040 doi (NATIONALLICENCE)springer-10.1134/S1075701513070040 Thermodynamics of arsenates, selenites, and sulfates in the oxidation zone of sulfide Ores: Part VII. Solubility of synthetic analogs of erythrite and annabergite at 25°C [Elektronische Daten] [M. Charykova, V. Krivovichev, O. Yakovenko, V. Semenova, K. Semenov, W. Depmeier] Understanding the mechanisms of arsenic's behavior under near-surface conditions is one of the actual problems of contemporary mineralogy and geochemistry and is important for solving environmental problems. The aim of this study is to synthesize analogs of erythrite and annabergite and to investigate their solubility in water. These phases have been synthesized by the boiling-dry of aqueous solutions of cobalt and nickel nitrates mixed with sodium hydroarsenate alkalized with NaOH. The samples obtained have been identified with electron microprobe, X-ray diffraction, and IR spectroscopy. Solubility has been determined by the isothermal saturation method in ampoules at 25°C. The solubility has been calculated using the Geochemist's Workbench (GMB 7.0) software package. The measured solubilities of erythrite and annabergite are 10−35.76 and 10−36.43, respectively. Eh-pH diagrams were calculated and plotted using the GMB 7.0 software package. The database comprises the thermodynamic parameters of 46 elements, 47 main particles, 48 redox pairs, 552 particles in solution, 624 solid phases, and 10 gases. The Eh-pH diagrams of the Ni-As-H2O and Co-As-H2O systems were plotted for the average contents of these elements in the acidic waters in the oxidation zones of sulfide deposits. The formation of erythrite and annabergite under near-surface conditions is discussed. Pleiades Publishing, Ltd., 2013 Charykova M. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut Krivovichev V. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut Yakovenko O. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut Semenova V. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut Semenov K. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut Depmeier W. Institut für Geowissenschaften, Abt. Mineralogie-Kristallographie, Universität Kiel, D-24098, Kiel, Germany aut Geology of Ore Deposits Springer US; http://www.springer-ny.com 55/7(2013-12-01), 525-531 1075-7015 55:7<525 2013 55 11477 https://doi.org/10.1134/S1075701513070040 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1075701513070040 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Charykova M. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Krivovichev V. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Yakovenko O. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Semenova V. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Semenov K. St. Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Depmeier W. Institut für Geowissenschaften, Abt. Mineralogie-Kristallographie, Universität Kiel, D-24098, Kiel, Germany aut NATIONALLICENCE 773 0- Geology of Ore Deposits Springer US; http://www.springer-ny.com 55/7(2013-12-01), 525-531 1075-7015 55:7<525 2013 55 11477 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 494164689 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer