Zur Kenntnis des Natriumthioferrates(III)
作者： Herbert Boller , Herbert Blaha
DOI: 10.1007/BF00798319
关键词: Chemistry 、 Polysulfide 、 Crystallography 、 Sodium 、 Qualitative inorganic analysis 、 Alkali metal 、 Crystal structure 、 Inorganic chemistry 、 Phase (matter) 、 Hydrate 、 Ion
摘要: The mixed valency compound Na3Fe2S4, which is also formed in iron-sodium polysulfide melts, oxidized and hydrated to NaFeS2·H2O (x ≈ 2) on air. It shown by TGA that this hydrate loses the water reversibly between 80–140 °C. A crystal structure model for free phase NaFeS2 proposed (space group I 222,a=6.25 A,b=10.83 A,c=5.40 A). formation of NaFeS2·xH2O from Na3Fe2S4 reversible transformation are topotactic. Na+ ions easily exchanged against K+, Rb+, Cs+, Tl+, Ca2+, Sr2+, Ba2+. high chemical reactivity sodium thioferrates discussed their structures compared with other alkali metal thioferrate structures.
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