Atomic and nuclear properties of materials:
Amber (C₁₀H₁₆O)

Quantity	Value	Units	Value	Units
<Z/A>	0.55179
Specific gravity	1.10	g cm-3
Minimum ionization	1.993	MeV g-1cm2	2.192	MeV cm-1
Nuclear collision length	57.1	g cm-2	51.91	cm
Nuclear interaction length	80.7	g cm-2	73.33	cm
Radiation length	43.05	g cm-2	39.14	cm
Critical energy	93.73	MeV (for e-)	91.25	MeV (for e+)
Molière radius	9.74	g cm-2	8.854	cm
Plasma energy	22.45	eV
Muon critical energy	1194.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac*
H	1	16.00	0.105930
C	6	10.00	0.788973
O	8	1.00	0.105096
* 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