#name   Format    NaI
NaI 	1
#
#  Elem	 rho(g/cm^3)	Gas/Solid(1/0)   refl.index Birks C

2         3.67			0          1.775     0 0 0
# 	Z	A  	N
	11	22.98	1
	53	126.9	1
