Aerosol Complex Refractive indices m=p-iq
H2SO4/H2O solutions
T=203 K

 
Real indices p
# entries
Spectral range (micron)
Concentration by weight (%)*
  8191
  0.6104-5000.0000  
30.0%
  8191
  0.6104-5000.0000  
45.0%
  8191
  0.6104-5000.0000  
57.0%
  8191
  0.6104-5000.0000  
64.0%

 
Imaginary indices q
# entries
Spectral range (micron)
Concentration by weight (%)*
  3897
  2.3857- 23.1492  
30.0%
  3962
  2.3522- 23.1492  
45.0%
  4018
  2.3227- 23.1492  
57.0%
  3945
  2.3608- 23.1492  
64.0%

 
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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).