Barium selenate

Barium selenate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.194 Edit this at Wikidata
EC Number
  • 232-113-8
UNII
UN number 2630
  • InChI=1S/Ba.H2O4Se/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
    Key: ZIGAPMSTBOKWRT-UHFFFAOYSA-L
  • [O-][Se](=O)(=O)[O-].[Ba+2]
Properties
BaSeO4
Molar mass 280.29
Appearance colourless crystals[1]
0.0118 g (20 °C)
0.0138 g (100 °C)
Hazards
GHS labelling:[2]
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
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
 barium sulfate
Other cations
 magnesium selenate
calcium selenate
strontium selenate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Barium selenate is an inorganic compound with the chemical formula BaSeO4. It is isomorphous with barium sulfate, but its solubility is 18 times that of barium sulfate, and its thermal stability is worse than that of barium sulfate.[3]

Preparation

Barium selenate can be obtained from the reaction of any soluble barium salt and sodium selenate:[1]

BaCl2 + Na2SeO4 → BaSeO4↓ + 2 NaCl

Properties

Barium selenate is a white solid that is slightly soluble in water.[4] When heated above 425 °C, the compound decomposes. Another barium selenate, barium diselenate, BaSe2O7, is also known. It has an orthorhombic baryte-type crystal structure with the space group Pnma (space group no. 62) (a = 8.993 Å, b = 5.675 Å, c = 7.349 Å).[5]

Uses

Barium selenate has been used as a "slow release" source of selenium for grazing animal feed crops and was intended to ensure selenium supply to grazing animals. In Switzerland and the EU, direct use as a feed additive is prohibited.[6][7] Barium selenide can be obtained by reducing barium selenate in a hydrogen stream:[8]

BaSeO4 + 4 H2 → BaSe + 4 H2O

References

  1. ^ a b Andara, A.; Salvado, M. A.; Fernández-González, Á.; García-Granda, S.; Prieto, M. (Apr 2005). "Crystal structure of barium selenate, BaSeO4". Zeitschrift für Kristallographie - New Crystal Structures. 220 (1–4): 5–6. doi:10.1524/ncrs.2005.220.14.5. ISSN 2197-4578.
  2. ^ "Barium selenate". pubchem.ncbi.nlm.nih.gov.
  3. ^ 无机化学丛书 第五卷 氧 硫 硒分族. 3. Selenates和碲酸盐. pp 392
  4. ^ "GESTIS-Stoffdatenbank". gestis.dguv.de. Retrieved 2024-01-25.
  5. ^ Andara, A.; Salvado, M. A.; Fernández-González, Á; García-Granda, S.; Prieto, M. (2005-04-01). "Crystal structure of barium selenate, BaSeO4". Zeitschrift für Kristallographie - New Crystal Structures (in German). 220 (1–4): 5–6. doi:10.1524/ncrs.2005.220.14.5. ISSN 2197-4578.
  6. ^ "Wirkstoff: Bariumselenat - Chemie". www.vetpharm.uzh.ch. Retrieved 2024-01-25.
  7. ^ Durchführungsverordnung (EU) 2015/446 der Kommission vom 17. März 2015 zur Änderung der Verordnung (EU) Nr. 37/2010 hinsichtlich des Stoffs "Bariumselenat" Text von Bedeutung für den EWR (in German), 2015-03-17, retrieved 2024-01-25
  8. ^ Handbuch der präparativen anorganischen Chemie. 2 (3., umgearb. Aufl ed.). Stuttgart: Enke. 1978. ISBN 978-3-432-87813-3.

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