Muon radiative energy loss (in 1.0E06 cm^2/g) in magnesium oxide MgO with Z/A = 0.49622 (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 0.3916 0.1787 0.4498 1.0201 5. 0.5310 0.4367 0.4775 1.4452 10. 0.6450 0.6487 0.4646 1.7582 20. 0.7636 0.8770 0.4444 2.0850 50. 0.9228 1.2002 0.4222 2.5452 100. 1.0396 1.4265 0.4113 2.8775 200. 1.1505 1.6333 0.4059 3.1897 500. 1.2796 1.8397 0.4053 3.5244 1000. 1.3610 1.9643 0.4119 3.7372 2000. 1.4279 2.0500 0.4227 3.9007 5000. 1.4935 2.1250 0.4429 4.0614 10000. 1.5278 2.1604 0.4632 4.1513 20000. 1.5520 2.1827 0.4870 4.2217 50000. 1.5716 2.2007 0.5241 4.2964 100000. 1.5811 2.2080 0.5559 4.3451