Atomic and nuclear properties of materials:
Cellulose nitrate (C₁₂H₁₄O₄(ONO₂)₆)_n

Quantity	Value	Units	Value	Units
<Z/A>	0.51424
Specific gravity	1.49	g cm-3
Minimum ionization	1.815	MeV g-1cm2	2.705	MeV cm-1
Nuclear collision length	60.0	g cm-2	40.24	cm
Nuclear interaction length	87.0	g cm-2	58.42	cm
Radiation length	37.18	g cm-2	24.95	cm
Critical energy	74.01	MeV (for e-)	72.01	MeV (for e+)
Molière radius	10.65	g cm-2	7.149	cm
Plasma energy	25.22	eV
Muon critical energy	975.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac*
H	1	7.00	0.029216
C	6	5.45	0.271296
N	7	2.09	0.121276
O	8	8.73	0.578212
* 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