Abstract
The electrical conductivity in olivine is found to obey the compensation law or the Meyer-Neldel rule; that is, a linear correlation exists between the logarithm of prefactor and activation energy. It is shown that the electrical conductivities due to different conduction mechanisms or conducting species converge to a constant at a characteristic temperature, resulting in the Meyer-Neldel rule. A number of experimental diffusion data in olivine also test the validity of the suggestion through the Nernst-Einstein equation.
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