RT Journal Article T1 Sustituciones Se042 -S042' en el yeso: un estudio experimental T1 SeO/'-SO/' substitution in gypsum: an experimental study A1 Fernández González, M. A. A1 Andara, A. A1 Prieto, M. AB Se/enaíe (SeOf) and sulfate (50/-) have similar structural and chemical properties, and they can play a similar geochemical role. The competition between both anions has been considered in different fields.We present experimental work on crystallisation of Ca(Se04,SC)J-2H20 solid solutions from aqueous solutions. A complete structural characterization of solid solutions by X-ray powder diffraction and thermocalorimetic analysis were carried out. The differences in structural parameters for the different solid compositions have allowed us to quantify the non-ideality of the solid solution and the calculation of a thermodynamic model of this solid solution-aqueous solution system.In addition, the work includes some observations on dehydration behaviour of CaSe0/2H20- CaS042H20 endmembers and solid solutions PB Sociedad Geológica de España YR 2004 FD 2004 LK http://hdl.handle.net/10272/8962 UL http://hdl.handle.net/10272/8962 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026