Aerosol Complex Refractive indices m=p-iq
H2SO4/H2O solutions
T=215 K

 
Real indices p
# entries
Spectral range (micron)
Concentration by weight (%)*
  8191
  0.6104-5000.0000  
70.0%
  8191
  0.6104-5000.0000  
75.0%
  8191
  0.6104-5000.0000  
80.0%

 
Imaginary indices q
# entries
Spectral range (micron)
Concentration by weight (%)*
  4768
  1.9887- 23.1492  
70.0%
  3944
  2.3618- 23.1492  
75.0%
  4768
  1.9887- 23.1492  
80.0%

 
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Reference: 

Biermann, U. M., B. P. Luo, and Th. Peter,  Absorption Spectra and Optical Constants of Binary and  Ternary Solutions of H2SO4, HNO3, and H2O in the Mid Infrared at Atmospheric Temperatures, J. Phys. Chem. A,  vol. 104, 783-793 (2000).