AM_Arrojadite-(KFe)_1 Formula: Al Fe14 Ca Na4 K P12 O48 F2 Name: Arrojadite-(KFe) Unit cell: 24.73 10.057 16.526 90.0 105.78 90.0 , V=3955.27 Space group: A12/A1 (15)

Moore P B , Araki T , Merlino S , Mellini M , Zanazzi P F , American Mineralogist , 66 (1981) p.1034-1049, The arrojadite-dickinsonite series, KNa4Ca(Fe,Mn)14Al(OH)2(PO4)12:, Crystal structure and crystal chemistry, sample NP, Locality: Nickel Plate mine, Keystone, South Dakota, USA