AM_Mitridatite_1
Formula: Fe3 Ca2 P3 O17 H6
Name: Mitridatite
Unit cell: 17.553 19.354 11.248 90.0 95.84 90.0 , V=3801.35
Space group: A1A1 (9)

Moore P B , Araki T , Inorganic Chemistry , 16 (1977) p.1096-1106, Mitridatite, Ca6(H2O)6[FeIII9O6(PO4)9]*3H2O., A noteworthy octahedral sheet structure, Locality: White Elephant pegmatite, Custer, South Dakota, USA