The room-temperature infrared reflectance of MgO has been remeasured. The reliability of the difficult minimum-reflectance-region remeasurements is such that the Kramers-Kronig output values of the absorption index are in good agreement with the experimental values in the high-frequency shoulder region. The experimentally obtained low-reflectance values also agree well with calculated values based on the partitioning technique of Wu and Andermann.
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Andermann et al. (1970) studied this question.
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