AM_Kentbrooksite_4 Formula: Ca3.51 Mn2.16 Ce.573 La.327 Nd.327 Yb.141 Y.51 Fe1.5 Al.84 Ti.36 Si24.94 Nb.46 Zr3.086 Na12.96 K.285 Sr.57 Ba.03 O74.93 Cl.798 F1.2 Name: Kentbrooksite Unit cell: 14.22 14.22 30.15 90.0 90.0 120.0 , V=5279.80 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: Locality: Burpala massif, Siberia, Russia, Sample: #17, Note: additional sites with low but unreported occupancies excluded, Note: X2d reported but missing z-coordinate