Ionic conductivity, on the other hand, is a measure of how well a material conducts electric current through the movement of charged ions. It is an important property in the context of electrolytes, which are substances that can conduct electricity when dissolved in a solvent or when in a molten state. Ionic conductivity (σ) is described as product of the concentration of mobile ions c, the charge of the ions q and the mobility µ of the charge carrier: