Ammonium pertechnetate

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Ammonium pertechnetate
Ammonium Pertechnetate Avogadro.png
Ammonium pertechnetate.jpg
Ammonium pertechnetate
Names
IUPAC name
Ammonium pertechnetate
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • InChI=1S/H2O.3O.Tc/h1H2;;;;/q;;;;+1/p-1 Yes check.svgY
    Key: WJULHBIORCQBSY-PUQAOBSFSA-O Yes check.svgY
  • [O-][Tc](=O)(=O)=O.[NH4+]
Properties
H4NO4Tc
Molar mass 180 g·mol−1
Related compounds
Other anions
Ammonium nitrate
Other cations
Sodium pertechnetate
Potassium pertechnetate
Calcium pertechnetate
Related compounds
Perchloric acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium pertechnetate is a chemical compound with the formula NH4TcO4. It is the ammonium salt of pertechnetic acid. The most common form uses 99Tc. [1] The compound is readily soluble in aqueous solutions forming ammonium and pertechnetate ions.

Contents

Synthesis

It can be synthesized by the reaction of pertechnetic acid and ammonium nitrate:

HTcO4 + NH4NO3 → NH4TcO4 + HNO3

It thermally decomposes under inert atmosphere at 700 °C to technetium dioxide:

NH4TcO4 → TcO2 + 2 H2O + 1/2 N2

Chemical properties

Passing hydrogen sulfide through acidic solutions of ammonium pertechnetate produces Technetium(VII) sulfide: [2] [3] [4]

2NH4TcO4 + 7H2S + 2HCl → Tc2S7↓ + 2NH4Cl + 8H2O

References

  1. "Ammonium pertechnetate[99Tc]".
  2. Boschke, Friedrich L. (31 December 1981). Inorganic Chemistry. Walter de Gruyter GmbH & Co KG. p. 131. ISBN   978-3-11-270829-3 . Retrieved 23 July 2024.
  3. "CharChem. Technetium(VII) sulfide". easychem.org. Retrieved 23 July 2024.
  4. Poineau, Frederic; Burton-Pye, Benjamin P.; Sattelberger, Alfred P.; Czerwinski, Kenneth R.; German, Konstantin E.; Fattahi, Massoud (2018). "Speciation and reactivity of heptavalent technetium in strong acids" . New Journal of Chemistry. 42 (10): 7522–7528. doi:10.1039/c7nj04912a. OSTI   1435661 . Retrieved 23 July 2024.