#SUBSTANCE=Askja ash
#DESCRIPTION=Ash from Askja volcanic eruption, 1875 layer C
#REFERENCE=Ball, J. G. C., B. E. Reed, R. G. Grainger, D. M. Peters, T. A. Mather, and D. M. Pyle (2015), Measurements of the complex refractive index of volcanic ash at 450, 546.7, and 650 nm. J. Geophys. Res. Atmos., 120, 7747–7757.
#DOI=10.1002/2015JD023521
#FORMAT= WAVL N DN K DK
0.4500	1.516	0.01	0.000221	0.000083
0.5467	1.510	0.01	0.000159	0.000044
0.6500	1.509	0.01	0.000147	0.000039
