in water pH=3; Product distribution / selectivity;

H2O2 in ethanol; water soln. of Fe(NH4)2(SO4)2*6H2O (pH 4.9) added at ambient temp. to stirred soln. of (NH4)H2PO4 in water-EtOH (1.5:1, v/v) in 1:1 vol. proportion; concd. soln. of H2O2 added; ppt. kept in contact with mother liquor for 30 min without stirring; ppt. collected on membrane filter; washed (H2O); dried at room temp. in air for 2 ds; calcined in air at 750°C for 10 h; monitored by X-ray diffraction;

in neat (no solvent, solid phase) Fe(PO3)3 and FePO4 were heated at 940°C for 72 h under O2, annealed for 15 d under vac. at 900°C;

in neat (no solvent) calcining (900°C);

in neat (no solvent) byproducts: Fe2O3, C5H12N2, H2O; thermal decomposition in flowing oxygen at 700 °C; detn. by powder XRD, TGA;

in water evapn. of soln. Fe(NO3)3 and H3PO4, annealing (400°C, N2 atmosphere, 24 h);

in neat (no solvent, solid phase) stoich. mixt. was heated for 12 h at 800°C, then 72 h at 940°C; obtained phosphates were pulverized; XRD;

in neat (no solvent, solid phase) mixt. was heated at 800°C in air for 12 h, then at 940°C in air for 24-48 h; XRD;