Optical Constants of Single Crystals of Mg, Zn, Cd, Al, Ga, In, and White Sn*

Abstract
The measured optical constants for the principal directions in these crystals are presented for the infrared out to about 20 μ. A comparison is made, using an Argand diagram, with simple free-electron theory and it is concluded that such an interpretation is not applicable to the results. Interband transitions may be stronger at these wavelengths than was previously believed.

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