AM_Oneillite Formula: Mn3.72 Y.24 Ca1.77 Ce1.08 La.63 Nd.33 Na13.59 Fe1.425 Zr3.18 Nb.93 Si25 Pr.09 K.195 O76.769 Cl.721 H1.269 Name: Oneillite Unit cell: 14.2084 14.2084 29.959 90.0 90.0 120.0 , V=5237.79 Space group: R113 (1)

Johnsen O , Grice J D , The Canadian Mineralogist , 37 (1999) p.865-891, The crystal chemistry of the eudialyte group, Locality: Mont Saint-Hilaire, Rouville County, Quebec, Canada, Sample: #5