Citation: Grice, J. D.; Chao, G. Y. (1997). Lukechangite-(Ce), a new rare-earth-fluorocarbonate mineral from Mont Saint-Hilaire, Quebec Note: U(1,2) for Na1, O1, O2 and F changed to match symmetry constraints. Note: U(2,3) for O2 changed to match symmetry constraints.. American Mineralogist, 82, pp. 1255-1260.