Terbium(III) bromide

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Terbium(III) bromide
Terbium(III) bromide Kristallstruktur Bismut(III)-iodid.png
Terbium(III) bromide
Names
Other names
terbium tribromide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.034.932 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 238-442-3
PubChem CID
  • InChI=1S/3BrH.Tb/h3*1H;/q;;;+3/p-3
  • [Br-].[Br-].[Br-].[Tb+3]
Properties
TbBr3
Molar mass 398.637 g/mol
Appearancewhite powder (hexahydrate) [1]
Density 4.62 g/cm3 [2]
Melting point 827 [3]  °C (1,521 °F; 1,100 K)
Boiling point 1,490 [4]  °C (2,710 °F; 1,760 K)
soluble [4]
Hazards
GHS labelling:
GHS-pictogram-exclam.svg
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Terbium(III) bromide (Tb Br3) is a crystalline chemical compound. [5]

Production and properties

Terbiun(III) bromide can be produced by heating terbium metal or terbium(III) oxide with ammonium bromide. [6]

Tb2O3 + 6 NH4Br → 2 TbBr3 + 6 NH3 + 3 H2O

A solution of terbium(III) bromide can crystallize a hexahydrate. When heating the hexahydrate, it will dehydrate and produce some terbium oxybromide (TbOBr). [7]

Terbium(III) bromide is a white solid that is soluble in water. [4] Its crystal structure is the same as bismuth iodide. [8]

References

  1. ↑ D. Brown, S. Fletcher, D. G. Holah (1968). "The preparation and crystallographic properties of certain lanthanide and actinide tribromides and tribromide hexahydrates" . Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 1889–1894. doi:10.1039/j19680001889. ISSN   0022-4944 . Retrieved 2020-05-29.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ↑ americanelements.com: Terbium Bromide
  3. ↑ Sigma-Aldrich Co., product no. 466344.
  4. 1 2 3 CRC Handbook of Chemistry and Physics, 87th Edition, S. 4–94
  5. ↑ "Terbium(III) bromide".
  6. ↑ Meyer, Gerd; Dötsch, Siegfried; Staffel, Thomas (January 1987). "The ammonium-bromide route to anhydrous rare earth bromides MBr3" . Journal of the Less Common Metals. 127: 155–160. doi:10.1016/0022-5088(87)90372-9 . Retrieved 2020-05-29.
  7. ↑ I. Mayer, S. Zolotov (September 1965). "The thermal decomposition of rare earth and yttrium bromide hydrates" . Journal of Inorganic and Nuclear Chemistry. 27 (9): 1905–1909. doi:10.1016/0022-1902(65)80042-2 . Retrieved 2020-05-29.
  8. ↑ Jean D'Ans, Ellen Lax (1997). Taschenbuch für Chemiker und Physiker. Springer DE. p. 1386. ISBN   354060035-3.


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