Английская Википедия:Chromium(III) sulfide
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Chromium(III) sulfide is the inorganic compound with the formula Cr2S3. It is a brown-black solid. Chromium sulfides are usually nonstoichiometric compounds, with formulas ranging from CrS to Cr0.67S (corresponding to Cr2S3).
Preparation
Chromium(III) sulfide can be prepared through the reaction of a stoichiometric mixture of the elements at 1000 °C[1]
- <math>\mathrm{2 \ Cr + 3 \ S \longrightarrow Cr_2S_3}</math>
It is a solid that is insoluble in water. According to X-ray crystallography, its structure is a combination of that of nickel arsenide (1:1 stoichiometry) and Cd(OH)2 (1:2 stoichiometry). Some metal-metal bonding is indicated by the short Cr-Cr distance of 2.78 Å.[2]
See also
- Brezinaite, a mineral with the formula Cr3S4
References
Шаблон:Chromium compounds Шаблон:Sulfides
Шаблон:Inorganic-compound-stub
- ↑ Georg Brauer: Handbuch der präparativen anorganischen Chemie. 3., umgearb. Auflage. Band III. Enke, Stuttgart 1981, Шаблон:ISBN, S. 1493
- ↑ Jellinek, F. "The structures of the Chromium Sulphides" Acta Crystallographica 1957, volume 10, p620-p628 Шаблон:Doi