The equilibrium solubility of the LaCl3 CdCl2 (9.7%)HCl H2O quaternary system at 298K was determined and the phase diagram was constructed. The results show that the system is complicated with four equilibrium solid p...The equilibrium solubility of the LaCl3 CdCl2 (9.7%)HCl H2O quaternary system at 298K was determined and the phase diagram was constructed. The results show that the system is complicated with four equilibrium solid phases CdCl2·H2O, 8CdCl2·LaCl3·16H2O(8∶1 type), 4CdCl2·LaCl3·12H2O(4∶1 type) and LaCl3·7H2O, respectively. The two new compounds 8CdCl2·LaCl3·16H2O(8∶1 type) and 4CdCl2·LaCl3·12H2O(4∶1 type) are congruently soluble in ～9.7%HCl H2O medium and have not yet been reported in literatures. Both compounds have been prepared from the system and have been characterized by XRD, TG DTG and DSC.展开更多
The complexation between gold and silica was experimentally confirmed and calibrated at 200℃:Thermodynamic calculations show that AuH3SiO40 would be far more abundant than AnCl2 un-der physicochemical conditions of g...The complexation between gold and silica was experimentally confirmed and calibrated at 200℃:Thermodynamic calculations show that AuH3SiO40 would be far more abundant than AnCl2 un-der physicochemical conditions of geological interest, suggesting that silica is much more importantthan chloride as ligands for gold transport. In systems containing both sulfur and silica, AuH3SiO40would be increasingly more important than Au (HS)2 as thc proportion of SiO2 in the system in -creases.The dissolution of gold in aqueous SiO2 soluhons can be described by the reachon:which indicates that SiO2 precipitahon is an effective mechanism governing gold deposihon, and thusexplains the close association of silicification and gold mineralization.展开更多
The solubility variation of the phase system HCl-KCl-H2O at 25 ℃ is reported when θHK（interactions between two species with the same charge） and ΨHKCl（interactions among three species） are changed within ±...The solubility variation of the phase system HCl-KCl-H2O at 25 ℃ is reported when θHK（interactions between two species with the same charge） and ΨHKCl（interactions among three species） are changed within ±10%. The calculated results indicate that the interactions among the three species are much stronger than that between the two species, whereas the combination of the two kinds of interactions result in great changes of the solubility of the system. This results is important for the salting out technology of the water-salt system.展开更多
文摘The equilibrium solubility of the LaCl3 CdCl2 (9.7%)HCl H2O quaternary system at 298K was determined and the phase diagram was constructed. The results show that the system is complicated with four equilibrium solid phases CdCl2·H2O, 8CdCl2·LaCl3·16H2O(8∶1 type), 4CdCl2·LaCl3·12H2O(4∶1 type) and LaCl3·7H2O, respectively. The two new compounds 8CdCl2·LaCl3·16H2O(8∶1 type) and 4CdCl2·LaCl3·12H2O(4∶1 type) are congruently soluble in ～9.7%HCl H2O medium and have not yet been reported in literatures. Both compounds have been prepared from the system and have been characterized by XRD, TG DTG and DSC.
文摘The complexation between gold and silica was experimentally confirmed and calibrated at 200℃:Thermodynamic calculations show that AuH3SiO40 would be far more abundant than AnCl2 un-der physicochemical conditions of geological interest, suggesting that silica is much more importantthan chloride as ligands for gold transport. In systems containing both sulfur and silica, AuH3SiO40would be increasingly more important than Au (HS)2 as thc proportion of SiO2 in the system in -creases.The dissolution of gold in aqueous SiO2 soluhons can be described by the reachon:which indicates that SiO2 precipitahon is an effective mechanism governing gold deposihon, and thusexplains the close association of silicification and gold mineralization.
文摘The solubility variation of the phase system HCl-KCl-H2O at 25 ℃ is reported when θHK（interactions between two species with the same charge） and ΨHKCl（interactions among three species） are changed within ±10%. The calculated results indicate that the interactions among the three species are much stronger than that between the two species, whereas the combination of the two kinds of interactions result in great changes of the solubility of the system. This results is important for the salting out technology of the water-salt system.
