Iron selenides

Iron selenide can be obtained from the Canadian Copper Refiners Ltd., Montreal, Quebec. 

The potentiostatic electrodeposition of iron selenide thin films has been reported recently in aqueous baths of ferric chloride (FeCb) and Se02 onto stainless steel and fluorine-doped TO-glass substrates [193], The films were characterized as polycrystalline and rich in iron, containing in particular a monoclinic FesSea phase. Optical absorption studies showed the presence of direct transition with band gap energy of 1.23 eV. 

Pawar SM, Moholkar AV, Suryavanshi UB, Rajpure KY, Bhosale CH (2007) Electrosynthesis and characterization of iron selenide thin films. Sol Energy Mater Sol Cells 91 560-565... 

Hydrogen Selenide, H2Se.—This compound was discovered in 1817 by J. J. Berzelius as the gaseous product of the interaction of hydrochloric acid and iron selenide or potassium selenide. 

When passed over heated iron boride, the gas interacts, forming iron selenide and selenium boride.7 With water no stable compound is produced, although the existence of an unstable crystalline hydrate has been observed.8 Sulphur dioxide and selenium dioxide oxidise a solution of hydrogen selenide, the product in the latter case being red selenium 9... 

The behavior of selenium in soils mirrors that of the pure oxides (Goldberg, 1985). In acid soils, selenium is likely to occur mainly as Se(lV) strongly adsorbed to iron oxides. Less commonly, Se(IV) may form highly insoluble iron compounds such as ferric selenite (Fe2(0H)4Se03) or iron selenide (FeSe). In alkaline, oxidized and selenium-rich soils, most of the selenium is likely to be present as Se(Vl) which is very weakly adsorbed. Furthermore, there are no common insoluble selenate minerals. Hence, selenate accumulates in soluble form particularly in arid and semi-arid areas where evaporation tends to concentrate selenium along with other soluble salts (Deverel et al., 1994). 

Gronvold, F., Heat capacities and thermodynamic properties of the iron selenides Fei o4Se, FevSeg, and Fe3Se4 from 298 to 1050°K, Acta Chem. Scand, 22, (1968), 1219-1240. Cited on pages 325, 326, 327, 329. 

Gronvold, F., Fligh-temperature reaction calorimeter. Enthalpy of formation of iron selenides and nickel selenides at 1050 K, Acta Chem. Scand, 26, (1972), 2085-2099. Cited on pages 311, 325, 326, 327. 

MON] De Montreuil, L. A., An unknown cobalt-iron selenide, El... 

The solubility of Se under reduced conditions is lower (controlled by an iron selenide phase) than under oxidizing conditions. When soil Eh or redox potential is increased, oxidation of Se(II, 0)... 

Mulpur, P., Mimani, T.R., and Kamisetti, V. (2013) Isolation of colloidal quantum dots of iron selenide exhibiting narrow range fluorescence in the green region. Journal of Nanoscience, Article ID 804290. 

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