Edafología. Volumen 7-1. Abril 2000. pág 107-119.
The Gibbs' Phase Rule is one of the most useful concepts to come out of classical ther-modynamics, with widespread applications in physics, chemistry and material science generally, In earth science the phase rule has been applied to igneous, metamorphic and sedimentary environments. However, the soil regime has been left somewhat as an orphan in this context. Here, the thermodynamic basis is explained, and some possible applications to soils and weathering systems are explored.