Composition of POLYETHYLENE TEREPHTHALATE (MYLAR):

             Density (g/cm3) = 1.40000E+00
 Mean Excitation Energy (eV) = 78.700000

 COMPOSITION:

        Z = Atomic number
       WT = Fraction by weight

               Z        WT
               1  0.041959
               6  0.625017
               8  0.333025