RT Journal Article T1 Supersaturation functions in binary solid solution–aqueous solution systems A1 Astilleros García-Monge, José Manuel A1 Pina Martínez, Carlos Manuel A1 Fernández Díaz, María Lourdes A1 Putnis, Andrew AB In this paper, we present a brief review of the thermodynamic equilibrium of binary solid solution–aqueous solution (SS-AS) systems and derive an expression hat allows us to evaluate the supersaturation or undersaturation of a given aqueous solution with respect to the whole range of solid compositions: the δ(x) function. Such an expression is based on the two conditions that define the SS-AS thermodynamic equilibrium. The derivation of the new supersaturation function, δ(x), was made by considering in detail the compositional relationships between solid and aqueous phases. To represent the new formulation on Lippmann diagrams, we have defined a new thermodynamic concept: the “actual activity.” In addition, we show how our supersaturation function behaves for both ideal and subregular solid solutions. The behaviour and applicability of both the δ(x) function and a previous supersaturation function, β(x), defined by Prieto et al.(1993), is discussed. PB Elsevier Science Ltd SN 0016-7037 YR 2003 FD 2003 LK https://hdl.handle.net/20.500.14352/49792 UL https://hdl.handle.net/20.500.14352/49792 LA eng DS Docta Complutense RD 6 abr 2025