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In this paper we present an analysis of the optical and microwave properties of metal–ammonia solutions in the concentration range 2–9 MPM. The analysis rests on the physical picture of a continuous metal–nonmetal transition, intermediated by microscopic inhomogeneities originating from bimodal concentration fluctuations. Effective-medium theory for the complex dielectric constant gives a good account of the optical properties of Li—NH3 in the energy range 0.6–1.4 eV. On the other hand, effective-medium theory is inadequate for the microwave properties, and results of numerical simulation are presented.
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Cohen et al. (1976) studied this question.
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