Corbin D R , Whitney J F , Fultz W C , Stucky G D , Eddy M M , Cheetham A K , Inorganic Chemistry , 25 (1986) p.2279-2280, Synthesis of open-framework transition-metal phosphates using organometallic, precursors in acidic media. Preparation and structural characterization of, Fe5P4O20H10 and NaFe3P3O12, Note: structure from ICSD