Definition: The term "spinodal" is a term used in spectroscopy and thermodynamics to describe a specific type of transition state that occurs when a molecule undergoes an electronic transition from one energy level to another. In this context, a spinodal point refers to a transition state at which the total energy of the system is maximum, as measured by the ground-state energy of the system. Spinodal points are often found in the vicinity of a transition metal center on the periodic table, and they can be
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