Muon radiative energy loss (in 1.0E06 cm^2/g) in rutherfordium (Rf) with Z = 104, A = [267.12179(4)] (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 2.3607 0.1292 0.3541 2.8440 5. 3.2867 1.9867 0.3778 5.6512 10. 4.0442 3.4354 0.3706 7.8501 20. 4.8217 4.7467 0.3575 9.9259 50. 5.8371 6.7738 0.3430 12.9540 100. 6.5569 8.1042 0.3362 14.9973 200. 7.2110 9.2765 0.3330 16.8204 500. 7.9403 10.3439 0.3332 18.6175 1000. 8.3763 10.9060 0.3384 19.6207 2000. 8.7130 11.3087 0.3464 20.3681 5000. 9.0229 11.6456 0.3611 21.0296 10000. 9.1751 11.7992 0.3757 21.3500 20000. 9.2753 11.9008 0.3927 21.5688 50000. 9.3647 11.9750 0.4192 21.7590 100000. 9.3941 12.0061 0.4420 21.8422