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A brand name for a highly refractive synthetic crystal composed of thallium bromide iodide. KRS-5 crystals are used infrared spectroscopy, optical instruments and infrared cameras as achromatic infrared lenses, prisms, reflectance elements and windows.

Sources Checked for Data in Record

  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942