TY - JOUR AU - Majzlan, Juraj PY - 2010/10/29 Y2 - 2024/03/29 TI - Advances and Gaps in the Knowledge of Thermodynamics and Crystallography of Acid Mine Drainage Sulfate Minerals JF - CHIMIA JA - Chimia VL - 64 IS - 10 SE - Scientific Articles DO - 10.2533/chimia.2010.699 UR - https://www.chimia.ch/chimia/article/view/2010_699 SP - 699 AB - Acidic and metal-rich waters produced by sulfide decomposition at mining sites are termed acid mine drainage (AMD). They precipitate a number of minerals, very often sulfates. The recent advances in thermodynamic properties and crystallography of these sulfates are reviewed here. There is a reasonable amount of data for the divalent (Mg, Ni, Co, Fe2+, Cu, Zn) sulfates and these data may be combined with and optimized by temperature-relative humidity brackets available in the literature. For the sulfates with Fe3+, most data exist for jarosite; for other minerals and phases in this system, a few calorimetric studies were reported. No data whatsoever are available for the Fe2+-Fe3+ sulfates. A significant advance is the development of the Pitzer model for Fe3+-sulfate solutions and its confrontation with the available thermodynamic and solubility data. In summary, our knowledge about the thermodynamic properties of the AMD sulfates is unsatisfactory and fragmented. ER -