AM_Mitridatite
Formula: Ca2 Fe3 P3 O17 H6
Name: Mitridatite
Unit cell: 17.53 19.35 11.25 90.0 95.92 90.0 , V=3795.71
Space group: A1A1 (9)

Moore P B , Araki T , Mineralogical Magazine , 41 (1977) p.527-528, Mitridatite - a remarkable octahedral sheet structure, Loclaity: White Elephant pegmatite, Custer, South Dakota, USA