AM_Barytolamprophyllite Formula: Ba.88 K.61 Sr.33 Ca.13 Ti2.91 Al.03 Fe.35 Nb.01 Na2.09 Mn.28 Mg.05 Si4 O18 Name: Barytolamprophyllite Unit cell: 19.8971 7.1165 5.4108 90.0 96.676 90.0 , V=760.96 Space group: C12/M1 (12)

Sokolova E , Camara F , The Canadian Mineralogist , 46 (2008) p.403-412, From structure topology to chemical composition. III. Titanium, silicates: The crystal chemistry of barytolamprophyllite, Locality: Mt. Yuksporr, Khibina alkaline massif, Kola Peninsula, Russia