Abstract
Solid H 3Fe(CN) 6 and H 4Fe(CN) 6 were heated at constant temperature in nitrogen, oxygen, and hydrogen. In these atmospheres, Prussian Blue type materials were formed at temperatures of 160° or less. The materials were characterized by chemical analysis, i.r. spectra, Mo¨ssbauer spectra, X-ray powder diffraction patterns, and magnetic susceptibility measurements. The products were reacted with water vapor, ammonia, and hydrogen chloride and approximately two moles of each gas per mole of iron were added. H 4Fe(CN) 6 was heated at 63·0° in moist oxygen and the decomposition followed by weight changes and by changes in the magnetic susceptibility. The steps of the Prussian Blue formation under these conditions are proposed.
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