Muon radiative energy loss (in 1.0E06 cm^2/g) in Francium with Z = 87, A = [223.01974(2)] (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 2.0176 0.3561 0.3603 2.7340 5. 2.8024 1.9319 0.3846 5.1189 10. 3.4435 3.1568 0.3771 6.9775 20. 4.1015 4.2859 0.3638 8.7512 50. 4.9620 6.0132 0.3489 11.3242 100. 5.5732 7.1516 0.3419 13.0667 200. 6.1301 8.1588 0.3386 14.6275 500. 6.7535 9.0795 0.3388 16.1718 1000. 7.1279 9.5661 0.3441 17.0381 2000. 7.4183 9.9163 0.3523 17.6869 5000. 7.6868 10.2087 0.3673 18.2629 10000. 7.8193 10.3435 0.3823 18.5451 20000. 7.9068 10.4314 0.3997 18.7379 50000. 7.9791 10.4967 0.4268 18.9027 100000. 8.0111 10.5239 0.4501 18.9850