#name   Format    H2 gas
H2 	2
#
#  Elem	 rho(g/cm^3)	Gas/Solid(1/0)  refl.index    Birks c    

1         0.0838		1           139.2      0 0 0
# 	Z	A  	N
	1	1.008	2
#  ⟨Z/A⟩   I[eV]   a       k      x0    x1     Cbar  delta0
0.992	 19.2  0.1409  5.7273  1.8639  3.2718  9.5834 0.00
