Atomic and nuclear properties of materials:
UNCONFIRMED Discovery not claimed
Status of ultraheavies as of March 2010 (pdf)

Quantity	Value	Units
Atomic number	117
Atomic mass	[294.(9)]	g mole-1
Density	??	g cm-3
Mean excitation energy	1227.0	eV
Minimum ionization	1.086	MeV g-1cm2
Nuclear collision length	126.0	g cm-2
Nuclear interaction length	224.3	g cm-2
Pion collision length	148.5	g cm-2
Pion interaction length	250.0	g cm-2
Radiation length	4.95	g cm-2
Critical energy	5.62	MeV (for e-)
Molière radius	18.65	g cm-2
Plasma energy	68.02	eV
Muon critical energy	112.	GeV

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: One of the atomic masses reported by the JINR-LLNL group is given.
Note: Density 14.0 g/cm³ and I_eff = 1227 eV assumed in calculating critical energies and dE/dx.