Atomic and nuclear properties of materials:
Polyethylene terephthalate (Mylar) (C₁₀H₈O₄)_n

Quantity	Value	Units	Value	Units
<Z/A>	0.52037
Density	1.40	g cm-3
Minimum ionization	1.848	MeV g-1cm2	2.588	MeV cm-1
Nuclear collision length	58.9	g cm-2	42.10	cm
Nuclear interaction length	84.9	g cm-2	60.62	cm
Pion collision length	86.3	g cm-2	61.64	cm
Pion interaction length	116.8	g cm-2	83.44	cm
Radiation length	39.95	g cm-2	28.54	cm
Critical energy	80.95	MeV (for e-)	78.78	MeV (for e+)
Molière radius	10.46	g cm-2	7.475	cm
Plasma energy	24.60	eV
Muon critical energy	1051.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac*
H	1	4.00	0.041959
C	6	5.00	0.625017
O	8	2.00	0.333025
* calculated from mass fraction data.

Explanation of some entries
For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PS PDF TEXT
Table of muon dE/dx and Range: PS PDF TEXT