The derived imaginary parts of the refractive indices, k, for the MMS-2 sample using the model framework with GRS2 particle shapes as presented in Martikainen et al. 2023, ApJS. 

The real part of the refractive index, n, was fixed to 1.5.

The uncertainties were computed by assuming a maximum error of 15% in the measured reflectance over the 200 to 2000 nm wavelength range.


wavelength	k		error
200		0.000795		±0.00008
225		0.000916		±0.00011
250		0.001006		±0.00014
275		0.001036		±0.00015
300		0.001040		±0.00014
325		0.001035		±0.00015
350		0.001078		±0.00018
375		0.001170		±0.00017
400		0.001200		±0.00014
450		0.001139		±0.00018
500		0.001093		±0.00017
550		0.000910		±0.00016
600		0.000407		±0.00010
650		0.000338		±0.00009
700		0.000287		±0.00009
750		0.000258		±0.00008
800		0.000285		±0.00009
850		0.000321		±0.00010
900		0.000327		±0.00010
950		0.000294		±0.00011
1000		0.000257		±0.00010
1050		0.000242		±0.00010
1100		0.000238		±0.00010
1150		0.000245		±0.00010
1200		0.000252		±0.00010
1250		0.000260		±0.00011
1300		0.000274		±0.00011
1350		0.000279		±0.00012
1400		0.000298		±0.00013
1450		0.000313		±0.00013
1500		0.000318		±0.00013
1550		0.000326		±0.00014
1600		0.000333		±0.00014
1650		0.000343		±0.00014
1700		0.000343		±0.00014
1750		0.000353		±0.00014
1800		0.000351		±0.00016
1850		0.000362		±0.00016
1900		0.000401		±0.00017
1950		0.000426		±0.00018
2000		0.000396		±0.00018