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. 1.8359 0.4609 0.3659 2.6627 5. 2.5446 1.8819 0.3907 4.8172 10. 3.1228 2.9846 0.3831 6.4905 20. 3.7162 4.0144 0.3647 8.0952 50. 4.4928 5.5788 0.3542 10.4258 100. 5.0451 6.6132 0.3470 12.0053 200. 5.5494 7.5311 0.3436 13.4241 500. 6.1157 8.3729 0.3438 14.8324 1000. 6.4569 8.8191 0.3491 15.6251 2000. 6.7224 9.1406 0.3575 16.2206 5000. 6.9688 9.4101 0.3728 16.7518 10000. 7.0908 9.5340 0.3881 17.0130 20000. 7.1717 9.6155 0.4059 17.1931 50000. 7.2385 9.6759 0.4336 17.3480 100000. 7.2682 9.7010 0.4573 17.4265