Caesium bromide

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Caesium bromide
Names
IUPAC name
Cesium bromide
Other names
Cesium bromide,
Caesium(I) bromide
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.029.209 Edit this at Wikidata
EC Number
  • 232-130-0
RTECS number
  • FK9275000
UNII
  • InChI=1S/BrH.Cs/h1H;/q;+1/p-1 checkY
    Key: LYQFWZFBNBDLEO-UHFFFAOYSA-M checkY
  • InChI=1/BrH.Cs/h1H;/q;+1/p-1
    Key: LYQFWZFBNBDLEO-REWHXWOFAA
  • [Cs+].[Br-]
Properties
CsBr
Molar mass 212.809 g/mol[1]
Appearance White solid
Density 4.43 g/cm3[1]
Melting point 636 °C (1,177 °F; 909 K)[1]
Boiling point 1,300 °C (2,370 °F; 1,570 K)[1]
1230 g/L (25 °C)[1] Disputed.

420 g/L (11 °C) See References
560 /L (15°C)
1020 g/L (28.5 °C)
1180 g/L (31 °C)
1240 g/L (32.5 °C)
1380 g/L (35 °C)

-67.2·10−6 cm3/mol[2]
1.8047 (0.3 μm)
1.6974 (0.59 μm)
1.6861 (0.75 μm)
1.6784 (1 μm)
1.6678 (5 μm)
1.6439 (20 μm)[3]
Structure
CsCl, cP2
Pm3m, No. 221[4]
a = 0.4291 nm
0.0790 nm3
1
Cubic (Cs+)
Cubic (Br−)
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H315, H319, H335
P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
1400 mg/kg (oral, rat)[5]
Related compounds
Other anions
 Caesium fluoride
Caesium chloride
Caesium iodide
Caesium astatide
Other cations
Francium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Caesium bromide or cesium bromide is an ionic

rocksalt type in nanometer-thin film grown on mica, LiF, KBr or NaCl substrates.[6]

Synthesis

Caesium bromide can be prepared via following reactions:

CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l)
Cs2(CO3) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H2O (l) + CO2 (g)
  • Direct synthesis:
2 Cs (s) + Br2 (g) → 2 CsBr (s)

The direct synthesis is a vigorous reaction of caesium with bromine. Due to its high cost, it is not used for preparation.

Uses

Caesium bromide is sometimes used in optics as a

spectrophotometers
.

References

  1. ^ a b c d e Haynes, p. 4.57
  2. ^ Haynes, p. 4.132
  3. ^ Haynes, p. 10.240
  4. doi:10.1063/1.1713597
    .
  5. ^ Caesium bromide. nlm.nih.gov
  6. doi:10.1107/S0365110X51001641
    .


* Crystran Ltd experimental data July 2021 Archived 2012-12-18 at the Wayback Machine

Cited sources

External links

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