Iron(II) selenate

Iron(II) selenate
Names
Other names
Ferrous selenate
Identifiers
Properties
FeSeO4
Molar mass 198.808 (anhydrous)
288.888 (pentahydrate)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Iron(II) selenate is an inorganic compound with the formula FeSeO4. The pentahydrate [Fe(H2O)4]SeO4.H2O is isomorphous to the corresponding iron(II) sulfate.[2]

Preparation

Iron(II) selenate can be prepared by the reaction of saturated sodium selenate and iron(II) sulfate at 80 °C. When cooled to room temperature, crystalline iron(II) selenate precipitates from the solution.[3]

Na2SeO4(sat.) + FeSO4 → Na2SO4 + FeSeO4

The reaction of iron and selenic acid produces iron(II) selenate as well, but with a side product:[4]

Fe + H2SeO4 → FeSeO4 + H2↑
3 Fe + 4 H2SeO4 → 3 FeSeO4 + Se + 4 H2O

Other species containing oxoanion of selenium

Double salts like the Tutton's salts (NH4)2Fe(SeO4)2•6H2O and K2Fe(SeO4)2•6H2O are known.[4] The ferric compound Fe2(SeO4)3 was also reported.[5]

However, iron(II) selenite (FeSeO3) is unknown, though the selenite and pyroselenite of iron(III) was published.[6]

References

  1. ↑ CAS No. from SciFinder
  2. ↑ K. Heinzinger, G. Pálinkás, Hubertus Kleeberg. Interactions of Water in Ionic and Nonionic Hydrates: Proceedings of a Symposium in honour of the 65th birthday of W.A.P. Luck Marburg/FRG, 2.–3.4. 1987. Springer-Verlag Berlin Heidelberg, 1987
  3. ↑ Filonenko, E. N.; Vergeichik, E. N.. Preparation and analysis of cobalt (II) selenate and iron (II) selenate. Farmatsiya (Moscow), 1998. 47 (3): 36-37
  4. 1 2 A E H Tutton. Selenic Acid and Iron. - Reduction of Selenic Acid by Nascent Hydrogen and Hydrogen Sulphide. - Preparation of Ferrous Selenate and Double Selenates of Iron Group. Proceedings of the Royal Society A, 1918 , 94 (241) :352-361
  5. ↑ G Giester, F Pertlik. Synthesis and crystal structure of iron(III) selenate(IV) trihydrate, Fe2(SeO3)3·3H2O. Journal of Alloys & Compounds, 1994 , 210 (1-2) :125-128
  6. ↑ Pinaev, G. F.; Stukan, R. A.; Makarov, E. F.. Moessbauer effect in iron(3+) selenites. Zhurnal Neorganicheskoi Khimii, 1977. 22 (7): 1731-1733
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