Ammonium selenate

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Ammonium selenate
Names
IUPAC name
diazanium;selenate
Other names
Diammonium selenate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.077 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 231-985-7
PubChem CID
UNII
  • InChI=1S/H8N2O4Se/c1-5-7(3,4)6-2/h1-2H4
    Key: HSQMXXJIBPJBCG-UHFFFAOYSA-N
  • [NH4+].[NH4+].[O-][Se](=O)(=O)[O-]
Properties
H8N2O4Se
Molar mass 179.045 g·mol−1
Appearancewhite crystals
Density 2.194 g/cm3
soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium selenate is a chemical compound with the chemical formula (NH4)2O4Se. [1] [2]

Contents

Synthesis

Synthesis is via a reaction of selenic acid with an excess of ammonium hydroxide. [3]

It may also be formed by the effect of an ammonia solution on a solution of selenic acid:

2NH3 + H2SeO4 → (NH4)2SeO4

Physical properties

Ammonium selenate forms white crystals of monoclinic system, spatial group C2/m, cell parameters a = 12.152, b = 6.418, c = 7.711, β = 115.5° Z = 4 and density 2.190 Mgm−3. [4]

It is easily soluble in water. [5] Soluble in EtOH and acetone. [6]

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<span class="mw-page-title-main">Ammonium nitrite</span> Chemical compound

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<span class="mw-page-title-main">Ammonium hydrosulfide</span> Chemical compound

Ammonium hydrosulfide is the chemical compound with the formula [NH4]SH.

Selenic acid is the inorganic compound with the formula H2SeO4. It is an oxoacid of selenium, and its structure is more accurately described as O2Se(OH)2. It is a colorless compound. Although it has few uses, one of its salts, sodium selenate is used in the production of glass and animal feeds.

<span class="mw-page-title-main">Ammonium perrhenate</span> Chemical compound

Ammonium perrhenate (APR) is the ammonium salt of perrhenic acid, NH4ReO4. It is the most common form in which rhenium is traded. It is a white salt; soluble in ethanol and water, and mildly soluble in NH4Cl. It was first described soon after the discovery of rhenium.

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Ammonium tetrathiomolybdate is the chemical compound with the formula (NH4)2MoS4. This bright red ammonium salt is an important reagent in the chemistry of molybdenum and has been used as a building block in bioinorganic chemistry. The thiometallate (see metallate) anion has the distinctive property of undergoing oxidation at the sulfur centers concomitant with reduction of the metal from Mo(VI) to Mo(IV).

<span class="mw-page-title-main">Ammonium heptamolybdate</span> Chemical compound

Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH4)6Mo7O24, normally encountered as the tetrahydrate. A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate, although "ammonium molybdate" can also refer to ammonium orthomolybdate, (NH4)2MoO4, and several other compounds. It is one of the more common molybdenum compounds.

Ammonium orthomolybdate is the inorganic compound with the chemical formula (NH4)2MoO4. It is a white solid that is prepared by treating molybdenum trioxide with aqueous ammonia. Upon heating these solutions, ammonia is lost, to give ammonium heptamolybdate ((NH4)6Mo7O24·4H2O).

Langbeinites are a family of crystalline substances based on the structure of langbeinite with general formula M2M'2(SO4)3, where M is a large univalent cation, and M' is a small divalent cation. The sulfate group, SO2−4, can be substituted by other tetrahedral anions with a double negative charge such as tetrafluoroberyllate, selenate, chromate, molybdate, or tungstates. Although monofluorophosphates are predicted, they have not been described. By redistributing charges other anions with the same shape such as phosphate also form langbeinite structures. In these the M' atom must have a greater charge to balance the extra three negative charges.

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<span class="mw-page-title-main">Plutonium(IV) nitrate</span> Chemical compound

Plutonium (IV) nitrate is an inorganic compound, a salt of plutonium and nitric acid with the chemical formula Pu(NO3)4. The compound dissolves in water and forms crystalline hydrates as dark green crystals.

Praseodymium(III) selenate is an inorganic compound, the salt of praseodymium and selenic acid with the chemical formula Pr2(SeO4)3. It forms green crystals when hydrated.

<span class="mw-page-title-main">Thulium(III) selenate</span> Chemical compound

Thulium(III) selenate is an inorganic compound, with the chemical formula Tm2(SeO4)3. It can be obtained by reacting a thulium(III) oxide and selenic acid solution and crystallizing it. It crystallises with ammonium selenate in an aqueous solution to obtain NH4Tm(SeO4)2·3H2O.

<span class="mw-page-title-main">Erbium(III) selenate</span> Chemical compound

Erbium(III) selenate is an inorganic compound, with the chemical formula Er2(SeO4)3. It exists as an anhydrate or an octahydrate.

<span class="mw-page-title-main">Holmium(III) selenate</span> Chemical compound

Holmium(III) selenate is an inorganic compound with the chemical formula Ho2(SeO4)3. It exists in the anhydrous form and as an octahydrate. It can be obtained by dissolving holmium(III) oxide in selenic acid solution and evaporating and crystallizing it. It co-crystallizes with other selenates in solution to obtain complex salts such as K3Ho(SeO4)3·nH2O, NH4Ho(SeO4)2·3H2O and CH3NH3Ho(SeO4)2·5H2O.

Cerium(IV) selenate is an inorganic compound with the chemical formula Ce(SeO4)2.

Cerium(III) selenate is an inorganic compound with the chemical formula Ce2(SeO4)3. It can be obtained by reacting selenic acid and cerium(III) carbonate, and the solvent is evaporated to precipitate crystals. The double salt CsCe(SeO4)2·4H2O can be obtained from mixing cerium(III) selenate and cesium selenate in an aqueous solution, and then evaporating and crystallizing the solution.

Caesium selanate is an inorganic compound, with the chemical formula of Cs2SeO4. It can form colourless crystals of the orthorhombic crystal system.

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

References

  1. ↑ "Ammonium selenate". NIST . Retrieved 4 February 2025.
  2. ↑ Specific Gravities, Boiling Points, and Melting Points: First Supplement to Part I. Smithsonian Institution. 1876. p. 18. Retrieved 4 February 2025.
  3. ↑ Satya, Prakash (2013). Advanced Chemistry of Rare Elements. S. Chand Publishing. p. 300. ISBN   978-81-219-4254-6 . Retrieved 4 February 2025.
  4. ↑ Carter, R. L.; Koerntgen, C.; Margulis, T. N. (15 February 1977). "Ammonium selenate". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry . 33 (2): 592–593. doi:10.1107/S0567740877004208. ISSN   0567-7408 . Retrieved 4 February 2025.
  5. ↑ Comey, Arthur Messenger (1896). A Dictionary of Chemical Solubilities Inorganic: xx, 515 p. Macmillan & Company. p. 351. Retrieved 4 February 2025.
  6. ↑ "MatWeb - The Online Materials Information Resource". matweb.com. Retrieved 4 February 2025.
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