AM_Phosphosiderite
Formula: Fe P (O6 H4)
Name: Phosphosiderite
Unit cell: 5.3 9.77 8.73 90.0 90.6 90.0 , V=452.02
Space group: P121/N1 (14)

Moore P B , American Mineralogist , 51 (1966) p.168-176, The crystal structure of metastrengite and its relationship to strengite and, phosphophyllite