Formula: Na14 Ce2 C4 O12 F
Name: Lukechangite-(Ce)
Unit cell: 5.0612 5.0612 22.82 90.0 90.0 120.0 , V=506.24
Space group: P63/MMC (194)

Grice J D , Chao G Y , American Mineralogist , 82 (1997) p.1255-1260, 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.