Atomic and nuclear properties of LMP rock for Doug
QuantityValueUnits ValueUnits
<Z/A> 0.49641     
Specific gravity 2.700 g cm-3   
Mean excitation energy 145.9 eV   
Minimum ionization 1.669 MeV g-1cm2 4.506 MeV cm-1
Nuclear collision length 65.9 g cm-2 24.40 cm
Nuclear interaction length 99.2 g cm-2 36.74 cm
Pion collision length 92.6 g cm-2 34.28 cm
Pion interaction length 130.1 g cm-2 48.20 cm
Radiation length 26.02 g cm-2 9.639 cm
Critical energy 47.76 MeV (for e-) 46.41 MeV (for e+)
Molière radius 11.55 g cm-2 4.279 cm
Plasma energy ℏωp 33.36 eV   
Muon critical energy 676. GeV   
Composition:
Elem ZAtomic frac* Mass frac
Si
 14
0.25
0.335584
Ti
 22
0.00
0.002863
Al
 13
0.07
0.086423
Fe
 26
0.01
0.023467
Mn
 25
0.00
0.000386
Mg
 12
0.01
0.011768
Ca
 20
0.01
0.013805
Na
 11
0.00
0.003250
K
19
0.02
0.029258
P
15
0.00
0.000652
O
8
0.64
0.492543
* calculated from mass fraction data

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PDF TEXT
Table of muon dE/dx and Range: PDF TEXT
Explanation of some entries
Note: Ieff calculated using the ICRU37 Table 5.1 algorithm for liquids and solids