# this file is part of refractiveindex.info database
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REFERENCES: "G. Hettner and G. Leisegang. Dispersion of the mixed crystals TlBr-TlI (KRS-5) and TlCl-TlBr (KRS-6) in the infrared, <i>Optik</i>, <b>3</b>, 305-314 (1948) [in German], as cited in Handbook of Optics, 3rd edition, Vol. 4. McGraw-Hill 2009 (data fit by Handbook of Optics, corrected by refractiveindex.info)"
DATA:
  - type: formula 4
    range: 0.6 24
    coefficients: 1 3.821 2 0.02234 2 0 0 0 1 -0.000877 2