Muon radiative energy loss (in 1.0E06 cm^2/g) in Lanthanum with Z = 57, A = 138.90547(7) (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 1.4620 0.5341 0.3772 2.3733 5. 2.0182 1.6436 0.4029 4.0648 10. 2.4712 2.5035 0.3949 5.3696 20. 2.9360 3.3279 0.3754 6.6393 50. 3.5457 4.5642 0.3645 8.4744 100. 3.9807 5.3875 0.3569 9.7251 200. 4.3797 6.1230 0.3532 10.8560 500. 4.8305 6.8024 0.3534 11.9863 1000. 5.1041 7.1649 0.3589 12.6279 2000. 5.3185 7.4276 0.3676 13.1138 5000. 5.5190 7.6480 0.3836 13.5506 10000. 5.6191 7.7502 0.3995 13.7688 20000. 5.6857 7.8169 0.4181 13.9207 50000. 5.7411 7.8670 0.4469 14.0550 100000. 5.7659 7.8878 0.4716 14.1252