Cannabaceae

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Iron(II) selenate
Names
Other names
Ferrous selenate
Identifiers
3D model (JSmol)
  • (anhydrous): InChI=1S/Fe.H2O4Se/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
    Key: NCHUFZYUFAWBQI-UHFFFAOYSA-L
  • (pentahydrate): InChI=1S/Fe.H2O4Se.5H2O/c;1-5(2,3)4;;;;;/h;(H2,1,2,3,4);5*1H2/q+2;;;;;;/p-2
    Key: YXLBLVIIVLRXHU-UHFFFAOYSA-L
  • (anhydrous): [O-][Se](=O)(=O)[O-].[Fe+2]
  • (pentahydrate): [O-][Se](=O)(=O)[O-].[Fe+2].O.O.O.O.O
Properties
FeSeO4
Molar mass 198.8046 g/mol (anhydrous)
288.881 g/mol (pentahydrate)
324.91156 g/mol (heptahydrate)
Appearance green, unstable crystalline solid (heptahydrate)
soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Iron(II) selenate (ferrous selenate) is an inorganic compound with the formula FeSeO4. It has anhydrous and several hydrate forms. The pentahydrate has the structure, [Fe(H2O)4]SeO4•H2O, isomorphous to the corresponding iron(II) sulfate.[2] Heptahydrate is also known, in form of unstable green crystalline solid.[3]

Preparation

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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.[4]

Na2SeO4 (sat.) + FeSO4 → Na2SO4 + FeSeO4

The reaction of iron and selenic acid produces iron(II) selenate as well, but with a side product:[3]

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

Other species containing oxoanion of selenium

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Double salts like the Tutton's salts (NH4)2Fe(SeO4)2•6H2O and K2Fe(SeO4)2•6H2O are known.[3]

In addition to the ferrous (Fe2+) salt, the ferric (Fe3+) salt iron(III) selenate, Fe2(SeO4)3, has also been reported.[5]

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

References

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  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. ^ a b c 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
  4. ^ Filonenko, E. N.; Vergeichik, E. N.. Preparation and analysis of cobalt (II) selenate and iron (II) selenate. Farmatsiya (Moscow), 1998. 47 (3): 36-37
  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
source: https://en.wikipedia.org/wiki/Iron(II)_selenate

One thought on “Cannabaceae”

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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