Infrared absorption by small needle-shaped ionic crystals of cubic structure has recently been found to be anisotropic. In this note, a single strand is used as a limiting model for such a crystal, and the calculated absorption in both directions is shown to be in qualitative agreement with observations on lithium fluoride. Features of absorptions to be expected from other crystals are discussed.
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Herbert B. Rosenstock (1964) studied this question.
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