Muon radiative energy loss (in 1.0E06 cm^2/g) in magnesium carbonate MgCO%3# with Z/A = 0.49814 (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 0.3405 0.1533 0.4564 0.9502 5. 0.4615 0.3756 0.4839 1.3209 10. 0.5608 0.5606 0.4703 1.5916 20. 0.6645 0.7609 0.4495 1.8748 50. 0.8042 1.0437 0.4266 2.2746 100. 0.9073 1.2426 0.4155 2.5655 200. 1.0051 1.4250 0.4099 2.8400 500. 1.1195 1.6087 0.4092 3.1375 1000. 1.1921 1.7203 0.4159 3.3284 2000. 1.2519 1.7976 0.4270 3.4765 5000. 1.3109 1.8654 0.4475 3.6237 10000. 1.3418 1.8974 0.4682 3.7074 20000. 1.3635 1.9176 0.4924 3.7736 50000. 1.3815 1.9338 0.5304 3.8457 100000. 1.3901 1.9404 0.5629 3.8934