Formula: Ca5.61 Fe3.24 Mn.24 Y.12 Ce.24 La.132 Nd.138 Si25.83 Nb.2 Na14.04 Sr.06 K.3 Zr2.94 O75.54 Cl1.162 H.84
Name: Eudialyte
Unit cell: 14.242 14.242 30.004 90.0 90.0 120.0 , V=5270.50
Space group: R-3M (166)

Johnsen O , Grice J D , The Canadian Mineralogist , 37 (1999) p.865-891, The crystal chemistry of the eudialyte group, Locality: Illimaussaq complex, South Greenland, Sample: #15, Note: additional sites with low but unreported occupancies excluded, Note: y(M3a) adjusted to satisfy symmetry constraints