Solubility of chlorargyrite (AgCl) in water vapor at elevated temperatures and pressures

The solubility of gold in hydrogen sulfide gas: An experimental study

“…The method used in this study is identical to that described in previous experimental studies devoted to the transport of metals in the gas phase (e.g., Migdisov et al, 1999;Archibald et al, 2001Archibald et al, , 2002Zakaznova-Iakovleva et al, 2001;Migdisov and Williams-Jones, 2005;Rempel et al, 2006). The experiments were carried out in titanium-alloy autoclaves (Grade 2 and VT1-0) with volumes of $40-50 cm 3 .…”

“…By analogy with models developed for solid-H 2 O (vapor) systems (Migdisov et al, 1999;Archibald et al, 2001Archibald et al, , 2002Migdisov and Williams-Jones, 2005;Rempel et al, 2006), we propose that this species has the form of an uncharged solvated gaseous complex with reduced sulfur, e.g., AuS AE (H 2 S) n or AuHS AE (H 2 S) n , resulting from reactions of the type AuðsÞ þ ðn þ 1Þ Á H 2 SðgÞ ¼ AuS Á ðH 2 SÞ n ðgÞ þ H 2 ðgÞ ð11Þ AuðsÞ þ ðn þ 1Þ Á H 2 SðgÞ ¼ AuHS Á ðH 2 SÞ n ðgÞ þ 1…”

“…The first experimental study to address this issue was that of Migdisov et al (1999) who showed that at temperatures from 300 to 360°C and pressures up to 180 bars the solubility of silver in H 2 O-HCl vapors is orders of magnitude higher than predicted by simple volatility. They related this enhanced solubility to formation of the species AgCl AE (H 2 O) n .…”

Phase Equilibria in Binary and Ternary Hydrothermal Systems

“…Similar kind of sampling method was utilized by Migdisov et al (1999) for solubility measurements of salts in undersaturated water vapor at temperatures 300-360 °C with the only difference being that the solid was placed not in the sampler, which could be locked and open, but in open-ended platinum or quartz ampoules positioned near the top of the autoclave. After each run, the autoclave was quenched rapidly by air-cooling or placing it in a cold-water bath.…”

Ab Initio Molecular Dynamics Studies of Ionic Dissolution and Precipitation of Sodium Chloride and Silver Chloride in Water Clusters, NaCl(H2O)n and AgCl(H2O)n, n = 6, 10, and 14

“…[60] AgCl-A C H T U N G T R E N N U N G (H 2 O) n aerosols are formed by volcanic activity, and understanding their solvation properties is important for atmospheric chemistry. [61] Even though recent calculations show that the NaCl SSIP represents a local minimum on the potential energy surface of a cluster with six water molecules, [56] it may not be stable when thermal and entropic effects are considered. [36,39] Intuitively, molecules such as HCl are more soluble at a higher temperature, as evidenced by its ionic dissociation on a HCl-covered film of ice.…”