Atomic and nuclear properties of materials:
Carbon (gem diamond) (C )

Quantity	Value	Units	Value	Units
Atomic number	6
Atomic mass	12.0107(8)	g mole-1
Specific gravity	3.52	g cm-3
Minimum ionization	1.725	MeV g-1cm2	6.071	MeV cm-1
Nuclear collision length	59.2	g cm-2	16.82	cm
Nuclear interaction length	85.8	g cm-2	24.38	cm
Radiation length	42.70	g cm-2	12.13	cm
Critical energy	80.17	MeV (for e-)	77.94	MeV (for e+)
Molière radius	11.29	g cm-2	3.208	cm
Plasma energy	38.21	eV
Muon critical energy	1044.	GeV
Index of refraction (@ STP, Na D)	2.42

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: variety of melting points found, e.g. 4400 C, 3675 C
Table of isotopes
x ray mass attenuation coefficients