Neue Publikation zur Thermodynamik von Sn-Mineralen

The element tin is commonly seen as relatively immobile, especially in comparison to many cations with lower valence (such as Na+ or Ca2+) or small, highly charged cations (such as S6+ or As5+). In addition, tin is mostly found in nature as the mineral cassiterite (SnO2). If tin is mobile, however, where does it go? Only to cassiterite or is it captured by other minerals as well? The answers to such questions can be predicted by thermodynamics. In this work, we determined thermodynamic properties of a series of stannate minerals. We found that they are stabilized especially under alkaline conditions, such as those in cement. Few available analyses of natural aqueous solutions indicate that these minerals can indeed form, more readily than cassiterite, under such conditions and persist. The data provided here will help to understand the geochemical cycling of the element tin. The entire publication can be downloaded from https://doi.org/10.1016/j.ctta.2021.100005Externer Link