Chemistry:Nickel(II) selenate
From HandWiki
 
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| Properties | |
| NiSeO4 | |
| Molar mass | 201.64 |
| Appearance | green solid[1] |
| Density | 4.8 g·cm−3[2] 2.314 g·cm−3 (hexahydrate)[3] |
| Hazards | |
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| GHS Signal word | Danger |
| H317, H334, H341, H350i, H360D, H372, H410 | |
| P203Script error: No such module "Preview warning".Category:GHS errors, P233, P260, P261, P264, P270, P271, P272, P273, P280, P284, P302+352, P304+340, P318Script error: No such module "Preview warning".Category:GHS errors, P319Script error: No such module "Preview warning".Category:GHS errors, P321, P333+317Script error: No such module "Preview warning".Category:GHS errors, P342+316Script error: No such module "Preview warning".Category:GHS errors, P362+364Script error: No such module "Preview warning".Category:GHS errors, P391, P403, P405, P501 | |
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Other anions
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nickel(II) sulfate |
Other cations
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iron(II) selenate cobalt(II) selenate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Nickel(II) selenate is a selenate of nickel with the chemical formula NiSeO4.
Preparation
Nickel(II) selenate can be produced by the reaction of nickel(II) carbonate and selenic acid.[5]
- [math]\displaystyle{ \mathrm{ NiCO_3 \ + H_2SeO_4 \rightarrow NiSeO_4 + H_2O + CO_2 \uparrow} }[/math]
Properties
Nickel(II) selenate hexahydrate is a green solid.[1] It is tetragonal, space group P41212 (No. 92).[6] At 100 °C, nickel(II) selenate hexahydrate slowly loses water to the tetrahydrate, with space group P21/n (No. 14). At 510 °C, nickel(II) selenate decomposes directly into nickel selenite, which on further heating decomposes into nickel oxide and selenium dioxide.[7][2]
- [math]\displaystyle{ \mathrm{ NiSeO_4\cdot 6H_2O \ \xrightarrow[-H_2O]{100\,^\circ C}\ NiSeO_4\cdot 4H_2O \ \xrightarrow[-H_2O]{300\,^\circ C}\ NiSeO_4\cdot H_2O \ \xrightarrow[-H_2O]{390\,^\circ C}\ NiSeO_4 \ \xrightarrow[-O_2]{510\,^\circ C}\ NiSeO_3 \ \xrightarrow[-SeO_2]{690\,^\circ C}\ NiO } }[/math]
It and potassium selenate are cooled and crystallized in hot aqueous solution to obtain the blue-green [Ni(H2O)6](SeO4)2.[8]
- [math]\displaystyle{ \mathrm{ K_2SeO_4 \ + NiSeO_4 + 6H_2O \rightarrow K_2[Ni(H_2O)_6](SeO_4)_2 } }[/math]
References
- ↑ 1.0 1.1 Record of Nickelselenat in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 2019-12-30.
- ↑ 2.0 2.1 R. J. Meyer (2013), [[1] at Google Books Nickel Teil B — Lieferung 2. Verbindungen bis Nickel-Polonium], Springer-Verlag, ISBN 978-3-662-13302-6, [2] at Google Books
- ↑ William M. Haynes (2016), [[3], p. 78, at Google Books CRC Handbook of Chemistry and Physics, 94th Edition], CRC Press, pp. 78, ISBN 978-1-4665-7115-0, [4], p. 78, at Google Books
- ↑ "Nickel selenate" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/18690621#section=Safety-and-Hazards.
- ↑ Macintyre, Jane Elizabeth, ed (1997). Dictionary of inorganic compounds. Vol. 9: Suppl. 4. 9. London: Chapman & Hall. ISBN 978-0-412-75020-5.
- ↑ Fuess, H. (Dec 1970). "Die Kristallstruktur von Nickelselenat‐hexahydrat" (in en). Zeitschrift für anorganische und allgemeine Chemie 379 (2): 204–212. doi:10.1002/zaac.19703790212. ISSN 0044-2313. https://onlinelibrary.wiley.com/doi/10.1002/zaac.19703790212.
- ↑ Stoilova, D.; Koleva, V. (Jan 1997). "TG, DTA, DSC and X-ray powder diffraction studies on some nickel selenate hydrates" (in en). Thermochimica Acta 290 (1): 85–91. doi:10.1016/S0040-6031(96)03062-6. https://linkinghub.elsevier.com/retrieve/pii/S0040603196030626.
- ↑ Harald Euler, Bruno Barbier, Alke Meents, Armin Kirfel (September 2009). "Crystal structure of Tutton's salts K2[MII(H2O)6(SeO4)2, MII = Co, Ni, Zn and refinement of the crystal structure of potassium hexaaquamagnesium( II) selenate, K2[Mg(H2O)6](SeO4)2"]. Zeitschrift für Kristallographie - New Crystal Structures 224 (3): 351–354. doi:10.1524/ncrs.2009.0156. ISSN 2197-4578. https://www.degruyter.com/document/doi/10.1524/ncrs.2009.0156/html. Retrieved 2021-05-28.
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