Muon radiative energy loss (in 1.0E06 cm^2/g) in osmium (Os) with Z = 76, A = 190.23(3) (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 1.8362 0.4610 0.3659 2.6631 5. 2.5450 1.8822 0.3907 4.8179 10. 3.1233 2.9851 0.3831 6.4915 20. 3.7168 4.0150 0.3647 8.0965 50. 4.4935 5.5797 0.3542 10.4274 100. 5.0459 6.6142 0.3470 12.0071 200. 5.5504 7.5323 0.3436 13.4263 500. 6.1167 8.3742 0.3438 14.8347 1000. 6.4580 8.8205 0.3491 15.6276 2000. 6.7235 9.1424 0.3575 16.2234 5000. 6.9700 9.4116 0.3728 16.7544 10000. 7.0920 9.5359 0.3881 17.0160 20000. 7.1728 9.6171 0.4059 17.1958 50000. 7.2397 9.6774 0.4336 17.3507 100000. 7.2694 9.7025 0.4573 17.4292