AM_Niobophyllite Formula: K1.8 Cs.04 Na Mn1.98 Fe4.6 (Nb1.46 Ti.54) (Si7.76 Al.24) O30.86 F.13 H4.13 Name: Niobophyllite Unit cell: 5.4022 11.8844 11.6717 112.99 94.588 103.166 , V=659.66 Space group: P-1 (2)

Camara F , Sokolova E , Abdu Y , Hawthorne F C , The Canadian Mineralogist , 48 (2010) p.1-16, The crystal structures of niobophyllite, kupletskite-(Cs) and Sn-rich, astrophyllite: Revisions to the crystal chemistry of the, astrophyllite-group minerals, Locality: Seal Lake, Labrador, Canada