THERMAL DECOMPOSITION OF [M(NH)][Fe(CN)] (M = Ir, Rh) IN DIFFERENT ATMOSPHERES. CRYSTAL STRUCTURE OF [Rh(NH)][Fe(CN)]

The double complex salt [Rh(NH)][Fe(CN)] is structurally characterized. The thermal behavior of the salt [Rh(NH)][Fe(CN)] in reducing (He/H), inert (He) and oxidizing (Ar/O) atmospheres is studied in detail. The intermediate product of the decomposition of double complex salts [M(NH)][Fe(CN)] (M = Ir, Rh) is an X-ray amorphous polymer compound with the gross composition FeM(CN). The final product of the decomposition of [Rh(NH)][Fe(CN)] in reducing and inert atmospheres is an ordered FeRh alloy. In an oxidizing atmosphere, a solid solution of FeO and RhO oxides is predominantly formed. The obtained data allow us to consider double complex salts as precursors for obtaining iron-iridium and iron-rhodium alloys or oxide systems based on them.