The English version of our glossary is currently under construction and will be regularly updated.
A substance in phase equilibrium
A eutectic system refers to a substance in phase equilibrium, a state characterised by the fact that the external conditions can only be freely selected to a very minor extent. It typically involves a combination of two or more substances that are completely mixable in their fluid state, but not mixable in their solid state. At a certain temperature, the mixture solidifies.