Infrared spectroscopy KBr

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Christoph Schüßlbauer

KBr is optically transparent from the near UV-region up to the long-wave IR region (~ 0.25-25 µm). Hence, no absorption takes place and you will not find any features in an IR-spectrum taken from pure KBr.

Thomas Mayerhöfer

If you want to calculate the transmittance spectra in this range then you can use the optical constants provided in here: Article Optical Constants of Potassium Bromide in the Far Infrared