AM_Dickinsonite-(KMnNa)
Formula: Al Fe14 Ca Na4 K P12 O48 F2
Name: Dickinsonite-(KMnNa)
Unit cell: 24.94 10.131 16.722 90.0 105.6 90.0 , V=4069.46
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 BR, Locality: Branchville, Connecticut, USA