Thallium bromide-iodide

DTGS = deuterated triglycine sulfate KRS — 5 = mixed thallium bromide-iodide LT = lithium tantalate MCT = mercury cadmium telluride and OPO = optical parametric oscillator. 

Thallium bromide/iodide eutectic (KRS-5) 0.6-40 <0.05 2.4 For internal reflection in the far IR when moisture is a problem... 

In this technique a beam IR radiation is reflected many times, totally within an optical element made from special crystals such as KRS-5 (thallium bromide-iodide TlBr, Til). A portion of energy in the IR beam extends beyond the reflecting surface at each reflection (Fig. 10.73). An absorbing... 

As used in infrared spectroscopy, one type of internal reflectance plate (Fig. 11) is made of a high index of refraction material, such as thallium bromide-iodide. The plate is usually a few millimeters thick, and the ends are beveled to allow radiation entry into one end at an angle inside the plate. The beam is multiply internally reflected and zigzags between the surfaces until it leaves at the other end. A sample with a lower index of refraction than the plate is pressed into intimate contact with the plate on one or both sides. The zigzagging beam penetrates... 

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