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Cadmium selenate

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Cadmium selenate
CadmiumkationSelenat-Anion
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.060 Edit this at Wikidata
EC Number
  • 237-481-3
UNII
  • InChI=1S/Cd.H2O4Se/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
    Key: VTFKXHQTGNWIJW-UHFFFAOYSA-L
  • [Cd+2].[O-][Se](=O)(=O)[O-]
Properties
CdO4Se
Molar mass 255.381 g·mol−1
Appearance colourless solid (dihydrate)[1]
Density 3.62 g·cm−3 (dihydrate)[2]
Melting point 100 °C (dihydrate decomposes)[2]
70.5 g·l−1 [2]
Hazards
GHS labelling:[3]
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Warning
H301, H331, H373, H410
P260, P261, P264, P270, P271, P273, P301+P316, P304+P340, P316, P319, P321, P330, P391, P403+P233, P405, P501
Related compounds
Other anions
cadmium sulfate
cadmium selenite
Other cations
zinc selenate
mercury selenate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Cadmium selenate is a selenate of cadmium, with the chemical formula CdSeO4.

Preparation

[edit]

Cadmium selenate can be formed by the reaction of cadmium oxide and selenic acid. The product is a mixture of monohydrate and dihydrate.[4]

CdO + H2SeO4 → CdSeO4 + H2O

Properties

[edit]

Cadmium selenate dihydrate is a colorless solid. At 100 °C, the dihydrate releases water of crystallization to form cadmium selenate monohydrate.[1] The monohydrate is monoclinic with space group P21/c (no. 14),[4] while the dihydrate is orthorhombic, with space group Pbca (no. 61).[5]

References

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  1. ^ a b R. J. Meyer (2013), Cadmium System-Nummer 33, Springer-Verlag, p. 133, ISBN 978-3-662-11295-3
  2. ^ a b c William M. Haynes (2016), CRC Handbook of Chemistry and Physics, 94th Edition, CRC Press, p. 54, ISBN 978-1-4665-7115-0
  3. ^ "Cadmium selenate". pubchem.ncbi.nlm.nih.gov.
  4. ^ a b Stålhandske, C. (1981-11-15). "Structure of cadmium selenate monohydrate". Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 37 (11): 2055–2057. Bibcode:1981AcCrB..37.2055S. doi:10.1107/S0567740881007942.
  5. ^ H.U.v. Vogel (2013), Chemiker-Kalender, Springer-Verlag, p. 78, ISBN 978-3-662-06237-1