AM_Dickinsonite-(KMnNa)_1 Formula: K.5 Na4.92 Ca.51 Sr.05 Pb.01 Ba.01 Mn9.7 Fe3.8 Li.3 Al P12 O50 F.03 H1.97 Name: Dickinsonite-(KMnNa) Unit cell: 16.69 10.1013 24.8752 90.0 105.616 90.0 , V=4038.93 Space group: C1C1 (9)

Camara F , Oberti R , Chopin C , Medenbach O , American Mineralogist , 91 (2006) p.1249-1259, The arrojadite enigma: I. A new formula and, a new model for the arrojadite structure, Sample: Branchville, Connecticut, USA