Thallium Bromide Iodide - KRS-5

Thallium bromide iodide, also known as KRS-5, is a crystal material commonly used as an infrared (IR) window or lens in various scientific and industrial applications. It is a type of ternary compound made of thallium, bromine, and iodine, with a chemical formula of TlBrxI(1-x), where x can vary between 0 and 1.

KRS-5 is an excellent material for use in IR spectroscopy and imaging due to its high transmittance in the mid- to far-infrared range (2-40 microns). It is also resistant to thermal shock and has a low coefficient of thermal expansion, which makes it a suitable material for use in cryogenic applications.

KRS-5 is often used in Fourier transform infrared (FTIR) spectroscopy, where it is used as a window or lens to transmit IR radiation through a sample. It is also used in IR imaging applications, where it is used as a lens to focus IR radiation onto a detector.

However, KRS-5 is a toxic material and requires careful handling and disposal. Due to its toxicity, it is not recommended for use in medical applications or where there is a risk of human exposure.

In summary, thallium bromide iodide (KRS-5) is a high-quality material for use in IR spectroscopy and imaging applications due to its excellent IR transmittance, thermal stability, and low coefficient of thermal expansion. However, its toxicity requires careful handling and disposal.