Formula: Ca4.8 Mn2.34 Y.18 Ce.75 La.51 Fe1.47 Nb.78 Ta.07 Si24.93 Na13.08 Nd.15 K.24 Sr.06 Zr3 O76.47 Cl1.08 H.93
Name: Kentbrooksite
Unit cell: 14.2602 14.2602 29.98 90.0 90.0 120.0 , V=5279.75
Space group: R3M (160)

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: #3, Note: additional sites with low but unreported occupancies excluded