!# Mathis, Rumpl & Nordsieck 1977 (ApJ 217, 425)
!# Size distribution of dust grains.

!# First line: type of grain size distribution; number of dust components.

!# For each dust component, one block containing:
!# * First line: 
!#   -- 1 + number of grain size intervals;
!#   -- name of the file containing the optical properties;
!#   -- .true. if carbonaceous grains, .false. otherwise;
!#   -- normalisation of the size distribution in the first interval (others are computed by continuity).
!# * Following lines: for each size interval i,
!#   -- grain radius a_i in µm at the lower bound of the interval;
!#   -- slope of the size distribution (dn/da \propto a^slope) in [a_i, a_{i+1}[.
!# * Last line: grain radius at the upper bound of the last interval.

"slopes"  2
2  "opt_prop_graphites.txt"  .true.  7.413e-26 ! = 10^-25.13 (C in Draine & Lee 1984)
.005    -3.5
.25
2  "opt_prop_silicates.txt"  .false.  7.762e-26 ! = 10^-25.11 (C in Draine & Lee 1984)
.005    -3.5
.25
