Barium selenate

Barium selenate
Identifiers

CAS Number	7787-41-9^Y
3D model (JSmol)	Interactive image
ChemSpider	118681
ECHA InfoCard	100.029.194
EC Number	232-113-8
PubChem CID	134655
UNII	XEW84XNI9U
UN number	2630
CompTox Dashboard (EPA)	DTXSID90884432
InChI InChI=1S/Ba.H2O4Se/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 Key: ZIGAPMSTBOKWRT-UHFFFAOYSA-L
SMILES [O-][Se](=O)(=O)[O-].[Ba+2]
Properties
Chemical formula	BaSeO₄
Molar mass	280.29
Appearance	colourless crystals^[1]
Solubility in water	0.0118 g (20 °C) 0.0138 g (100 °C)
Hazards
GHS labelling:^[2]
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Precautionary statements	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). Infobox references

Chemical compound

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

^ ^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.
^ "Barium selenate". pubchem.ncbi.nlm.nih.gov.
^ 无机化学丛书第五卷氧硫硒分族. 3. Selenates和碲酸盐. pp 392
^ "GESTIS-Stoffdatenbank". gestis.dguv.de. Retrieved 2024-01-25.
^ 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.
^ "Wirkstoff: Bariumselenat - Chemie". www.vetpharm.uzh.ch. Retrieved 2024-01-25.
^ 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
^ Handbuch der präparativen anorganischen Chemie. 2 (3., umgearb. Aufl ed.). Stuttgart: Enke. 1978. ISBN 978-3-432-87813-3.