AM_Leucophosphite
Formula: K Fe2 P2 O11 H5
Name: Leucophosphite
Unit cell: 9.782 9.658 9.751 90.0 102.24 90.0 , V=900.28
Space group: P121/N1 (14)

Moore P B , American Mineralogist , 57 (1972) p.397-410, Octahedral tetramer in the crystal structure of leucophosphite,, K2[Fe4(OH)2(H2O)2(PO4)4].2H2O