Atomic and nuclear properties of materials:
Carbon (graphite) (C )

Quantity	Value	Units	Value	Units
Atomic number	6
Atomic mass	12.0107(8)	g mole-1
Specific gravity	2.21	g cm-3
Minimum ionization	1.742	MeV g-1cm2	3.850	MeV cm-1
Nuclear collision length	59.2	g cm-2	26.79	cm
Nuclear interaction length	85.8	g cm-2	38.83	cm
Radiation length	42.70	g cm-2	19.32	cm
Critical energy	81.74	MeV (for e-)	79.51	MeV (for e+)
Molière radius	11.08	g cm-2	5.012	cm
Plasma energy	30.28	eV
Muon critical energy	1057.	GeV
Sublimination temperature (@ 1 atm)	4098.	K	3825.	C

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
Explanation of some entries
Note: Density may vary 2.09 to 2.23
Table of isotopes
x ray mass attenuation coefficients