ChemInform Abstract: Preparation of Ferrates(VI) of Alkali Metals.

Abstract

033ChemInform Abstract A novel method of preparation of the title compounds Na4FeO5, K2FeO4 and Cs2FeO4 is described, which affords these free of any impurity. Fe is present exclusively in the hexavalent state, as is evidenced by Moessbauer spectra. The title compounds are prepared from the alkali peroxides and Fe2O3 in a stream of oxygen at elevated temperatures. The conditions necessary for the preparation of pure samples are determined in detail. They are to be strictly regarded.

Advances in the development and application of ferrate(VI) for water and wastewater treatment

“…6 Ferrate(VI) was also made using a dry preparation method with galvanising wastes, which were mixed with ferric oxide in a muffle furnace at 800…”

Synthesis, Crystal and Magnetic Structures of the Sodium Ferrate (IV) Na4FeO4 Studied by Neutron Diffraction and Mössbauer Techniques

“…The "nal values of the magnetic components (#a)" 3.50 (14) , (#b)"2.34(19) , (#c)"2.55 (21) give a total resultant magnetic moment $ "3.36 (12 (2) 1.812 (16) O (3)}Fe}O (1) 98.7(1) Fe}O (3) 1.802 (9) O (3)}Fe}O (4) 106.6(1) Fe}O (4) 1.794 (14) O (2)}Fe}O (1) 101.9(1) O (2)}Fe}O(4) 100.8(1) O (1)}Fe}O(4) 127.6 (1) Na (1)}O (1) 2.370 (14) Na (2)}O (1) 2.303(15) Na (1)}O(2) 2.397 (15) Na (2)}O (1) 2.411(13) Na (1)}O(2) 2.331 (18) Na (2)}O (4) 2.289(14) Na(1)}O (3) 2.420 (9) Na (2)}O (4) 2.340(18) Na(1)}O (3) 2.439 (13) Na (3)}O (1) 2.410 (12) Na (4)}O (1) 2.341(15) Na(3)}O (2) 2.332 (17) Na (4)}O (2) 2.387(14) Na(3)}O (3) 2.352 (15) Na (4)}O (2) 2.393(14) Na(3)}O (4) 2.398 (10) Na (4)}O (3) 2.497(13) Na(4)}O...…”

Removal of Ni(II) with sodium ferrate(VI) from EDTA-containing aqueous solutions

“…Sodium ferrate(VI) was prepared by the solid-phase reaction Fe 2 O 3 + Na 2 O 2 in an oxygen flow [10]. An X-ray diffraction (XRD) analysis of 20 samples prepared showed the set of reflections similar to those found for Na 4 FeO 5 [10].…”

“…Sodium ferrate(VI) was prepared by the solid-phase reaction Fe 2 O 3 + Na 2 O 2 in an oxygen flow [10]. An X-ray diffraction (XRD) analysis of 20 samples prepared showed the set of reflections similar to those found for Na 4 FeO 5 [10]. No additional reflections belong-ing to the initial compounds (Fe 2 O 3 and Na 2 O 2 ), ferrate(IV), ferrate(III), and Na 2 CO 3 , which can be formed in the presence of air, were observed.…”