Mass absorption coefficients for silicates (Weingartner & Draine 2001), alumina (Koike et al. 1995), amorphous carbon (Zubko et al. 2004), and silicon carbide (Pegourie 1988) are presented, for a grain size of 0.01 µm. For alumina at wavelengths smaller than 0.3 µm and for silicon carbide at wavelengths smaller than 0.2 µm, the values are extrapolated due to lack of data. In addition, for these two dust types, we do not have data for various grain sizes, and therefore these are generalized values for all sizes.