Atomic and nuclear properties of materials:
Calcium fluoride (CaF2)
QuantityValueUnits ValueUnits
<Z/A> 0.49670     
Density 3.18 g cm-3   
Minimum ionization 1.655 MeV g-1cm2 5.263 MeV cm-1
Nuclear collision length 70.1 g cm-2 22.04 cm
Nuclear interaction length 107.8 g cm-2 33.89 cm
Pion collision length 96.1 g cm-2 30.22 cm
Pion interaction length 137.5 g cm-2 43.23 cm
Radiation length 21.47 g cm-2 6.751 cm
Critical energy 38.82 MeV (for e-) 37.70 MeV (for e+)
Molière radius 11.73 g cm-2 3.688 cm
Plasma energy 36.22 eV   
Muon critical energy 565. GeV   
Index of refraction (@ STP, Na D) 1.43     
Composition:
Elem ZAtomic frac* Mass frac*
F
9
2.00
0.486659
Ca
 20
1.00
0.513341
* 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