AM_Samuelsonite Formula: Ba.42 Ca8.92 Fe.82 Na1.02 Mn1.8 P10 Al2 O42 H2 Name: Samuelsonite Unit cell: 18.495 6.805 14.0 90.0 112.75 90.0 , V=1624.94 Space group: C12/M1 (12)

Moore P B , Araki T , American Mineralogist , 62 (1977) p.229-245, Samuelsonite: its crystal structure and relation to apatite and octacalcium, phosphate