Ammonium hexafluoroindate

Ammonium hexafluoroindate
Names
Other names
Ammonium hexafluoroindate(III)
Identifiers
3D model (JSmol)
  • InChI=1S/6FH.In.3H3N/h6*1H;;3*1H3/q;;;;;;+3;;;/p-3
    Key: FSYGVNPMCCSLOH-UHFFFAOYSA-K
  • [NH4+].[NH4+].[NH4+].F[In-3](F)(F)(F)(F)F
Properties
F6H12InN3
Molar mass 282.925 g·mol−1
Appearance colorless crystals
Density g/cm3
insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium hexafluoroindate is an inorganic chemical compound with the chemical formula (NH4)3InF6.[1][2]

Synthesis

The compound can be obtained by reacting ammonium fluoride and indium bromide in anhydrous methanol, or by reacting ammonium fluoride and indium fluoride in aqueous solution.[3]

Also, a reaction involving indium hydroxide and ammonium fluoride:[4]

In(OH)3 + 3 HF + 3 NH4F → (NH4)3InF6 + 3 H2O

Physical properties

The compound decomposes at 120–170 °C to obtain NH4InF4, and further decomposes to InF3 at 185–300 °C.[5]

Ammonium hexafluoroindiate forms colorless crystals of tetragonal system, space group P4mnc,[6] insoluble in water.[4]

At 80 °C, a phase transition into the cubic phase occurs.

References

  1. ^ Roberts, John E.; Laubengayer, A. W. (November 1957). "Fluoride Complexes of Indium(III) 1". Journal of the American Chemical Society. 79 (22): 5895–5897. doi:10.1021/ja01579a016. ISSN 0002-7863. Retrieved 30 August 2024.
  2. ^ "Ammonium hexafluoroindate(iii)". NIST. Retrieved 30 August 2024.
  3. ^ Zakalyukin, R. M.; Boltalin, A. I.; Fedorov, P. P. (2001). "Synthesis of ammonium hexafluoroindate". Zhurnal Neorganicheskoi Khimii. 8 (46): 1247–1249. ISSN 0044-457X. Retrieved 30 August 2024.
  4. ^ a b Brauer, Georg (2 December 2012). Handbook of Preparative Inorganic Chemistry V1. Elsevier. p. 229. ISBN 978-0-323-16127-5. Retrieved 30 August 2024.
  5. ^ Beck, Lynda K.; Haendler Kugler, Blanca; Haendler, Helmut M. (December 1973). "The thermal decomposition of ammonium hexafluorogallate and ammonium hexafluoroindate. New crystalline forms of gallium fluoride and indium fluoride". Journal of Solid State Chemistry. 8 (4): 312–317. Bibcode:1973JSSCh...8..312B. doi:10.1016/S0022-4596(73)80027-1. S2CID 95324633.
  6. ^ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards. p. 108. Retrieved 30 August 2024.