Caesium bromide: Difference between revisions

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	{{chembox		{{chembox
			\| Watchedfields = changed
	\| verifiedrevid = ~~401939356~~		\| verifiedrevid = 443321289
⚫	\| ~~ImageFile~~ = Caesium-bromide-3D-ionic.png
			\| ImageFile = CsCl polyhedra.png
	\| ImageSize = ~~200px~~		\| ImageSize =
⚫	\| IUPACName = ~~Caesium~~ bromide
		⚫	\| ImageFile1 = Caesium-bromide-3D-ionic.png
		⚫	\| IUPACName = Cesium bromide
	\| OtherNames = Cesium bromide,<br/>Caesium(I) bromide		\| OtherNames = Cesium bromide,<br/>Caesium(I) bromide
	\| Section1 = {{Chembox Identifiers		\|Section1={{Chembox Identifiers
	\| ChemSpiderID_Ref = {{chemspidercite\|correct\|chemspider}}		\| ChemSpiderID_Ref = {{chemspidercite\|correct\|chemspider}}
	\| ChemSpiderID = 22994		\| ChemSpiderID = 22994
	\| SMILES = .		\| SMILES = .
	\| InChIKey = LYQFWZFBNBDLEO-REWHXWOFAA		\| InChIKey = LYQFWZFBNBDLEO-REWHXWOFAA
	\| StdInChI_Ref = {{stdinchicite\|correct\|chemspider}}		\| StdInChI_Ref = {{stdinchicite\|correct\|chemspider}}
	\| StdInChI = 1S/BrH.Cs/h1H;/q;+1/p-1		\| StdInChI = 1S/BrH.Cs/h1H;/q;+1/p-1
	\| StdInChIKey_Ref = {{stdinchicite\|correct\|chemspider}}		\| StdInChIKey_Ref = {{stdinchicite\|correct\|chemspider}}
	\| StdInChIKey = LYQFWZFBNBDLEO-UHFFFAOYSA-M		\| StdInChIKey = LYQFWZFBNBDLEO-UHFFFAOYSA-M
	\| CASNo = 7787-69-1		\| CASNo = 7787-69-1
	\| CASNo_Ref = {{cascite\|correct\|CAS}}		\| CASNo_Ref = {{cascite\|correct\|CAS}}
	\| EINECS = 232-130-0		\| EINECS = 232-130-0
	\| ~~PubChem~~ = ~~24592~~		\| RTECS = FK9275000
			\| UNII = 06M25EDM3F
⚫	\| InChI = 1/BrH.Cs/h1H;/q;+1/p-1
			\| PubChem = 24592
		⚫	\| InChI = 1/BrH.Cs/h1H;/q;+1/p-1
	}}		}}
	\| Section2 = {{Chembox Properties		\|Section2={{Chembox Properties
	\| Formula = CsBr		\| Formula = CsBr
	\| MolarMass = 212.81 g/mol		\| MolarMass = 212.809 g/mol<ref name=r1>Haynes, p. 4.57</ref>
	\| Appearance = White solid		\| Appearance = White solid
	\| Density = 4.44 g/cm<sup>3</sup>, ~~solid~~		\| Density = 4.43 g/cm<sup>3</sup><ref name=r1/>
	\| ~~MeltingPt~~ = 636 °C		\| MeltingPtC = 636
			\| MeltingPt_ref = <ref name=r1/>
	\| BoilingPt = 1300 °C
			\| BoilingPtC = 1300
⚫	\| Solubility = ~~1062~~ g/L (15 °C)<br/>~~1243~~ ~~g/L (25 °C)~~
			\| BoilingPt_ref = <ref name=r1/>
		⚫	\| Solubility = 1230 g/L (25 °C)<ref name=r1/> Disputed.
			420 g/L (11 °C) See References<br/> 560 /L (15°C)<br/>1020 g/L (28.5 °C)<br/>1180 g/L (31 °C)<br/>1240 g/L (32.5 °C)<br/>1380 g/L (35 °C)
			\| RefractIndex = 1.8047 (0.3 μm)<br/>1.6974 (0.59 μm)<br/>1.6861 (0.75 μm)<br/>1.6784 (1 μm)<br/>1.6678 (5 μm)<br/>1.6439 (20 μm)<ref>Haynes, p. 10.240</ref>
			\| MagSus = -67.2·10<sup>−6</sup> cm<sup>3</sup>/mol<ref>Haynes, p. 4.132</ref>
	}}		}}
	\| Section3 = {{Chembox Structure		\|Section3={{Chembox Structure
	\| CrystalStruct = ]		\| CrystalStruct = ], ]
			\| SpaceGroup = Pm{{overline\|3}}m, No. 221<ref name=str2>{{cite journal\|doi=10.1063/1.1713597\|title=Elastic Constants of CsBr and CsI from 4.2K to Room Temperature\|journal=Journal of Applied Physics\|volume=35\|issue=4\|pages=1222\|year=1964\|last1=Vallin\|first1=J.\|last2=Beckman\|first2=O.\|last3=Salama\|first3=K.\|bibcode=1964JAP....35.1222V}}</ref>
	\| Coordination = 8–8
			\| LattConst_a = 0.4291 nm
			\| UnitCellFormulas = 1
			\| UnitCellVolume =0.0790 nm<sup>3</sup>
			\| Coordination = Cubic (Cs<sup>+</sup>)<br/>Cubic (Br<sup>−</sup>)
	}}		}}
	\| Section4 = {{Chembox Hazards		\|Section4={{Chembox Hazards
	\| ~~EUIndex~~ = ~~Not listed~~		\| NFPA-H = 2
	\| ~~RPhrases~~ =		\| NFPA-F = 0
	\| ~~SPhrases~~ =		\| NFPA-R = 0
			\| GHSSignalWord=Warning
⚫	\| FlashPt = Non-flammable
			\| GHSPictograms={{GHS07}}
			\| HPhrases = {{H-phrases\|302\|315\|319\|335}}
			\| PPhrases = {{P-phrases\|261\|264\|270\|271\|280\|301+312\|302+352\|304+340\|305+351+338\|312\|321\|330\|332+313\|337+313\|362\|403+233\|405\|501}}
		⚫	\| FlashPt = Non-flammable
			\| LD50 = 1400 mg/kg (oral, rat)<ref>. nlm.nih.gov</ref>
	}}		}}
	\| Section8 = {{Chembox Related		\|Section8={{Chembox Related
	\| OtherAnions = ],<br/>],<br/>]		\| OtherAnions = ]<br/>]<br/>]<br/>]
	\| OtherCations = ],<br/>]<br/>]		\| OtherCations = ]<br/>]<br/>]<br/>]
	}}		}}
	}}		}}

	'''Caesium bromide''', ~~(CsBr),~~ is an ionic ] of ] and ]. It ~~has~~ ~~simple~~ ~~cubic~~ ~~p-type~~ cubic ~~crystallic~~ structure, ~~comparable~~ to ~~that~~ of ] type ~~with~~ ] ~~''Pm{{overline\|3}}m''~~ ~~and~~ ] ~~''a''~~ = ~~0.42953~~ nm. ~~Distance~~ ~~between~~ Cs and Br ~~atoms~~ ~~is 0~~.~~37198~~ nm.		'''Caesium bromide''' or '''cesium bromide''' is an ionic ] of ] and ] with the ] CsBr. It is a white or transparent solid with melting point at 636 °C that readily dissolves in water. Its bulk crystals have the cubic CsCl structure, but the structure changes to the ] type in nanometer-thin film grown on ], LiF, KBr or NaCl substrates.<ref name=str>{{cite journal\|doi=10.1107/S0365110X51001641\|title=Polymorphism of cesium and thallium halides\|journal=Acta Crystallographica\|volume=4\|issue=6\|pages=487–489\|year=1951\|last1=Schulz\|first1=L. G.\|bibcode=1951AcCry...4..487S }}</ref>

	== Synthesis ==		== Synthesis ==
	It can be prepared via following reactions:		Caesium bromide can be prepared via following reactions:
	* ]:		* ]:
	: CsOH (aq) + HBr (aq) → CsBr (aq) + H<sub>2</sub>O (l)		: CsOH (aq) + HBr (aq) → CsBr (aq) + H<sub>2</sub>O (l)
	: Cs<sub>2</sub>(CO<sub>3</sub>) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H<sub>2</sub>O (l) + CO<sub>2</sub> (g)		: Cs<sub>2</sub>(CO<sub>3</sub>) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H<sub>2</sub>O (l) + CO<sub>2</sub> (g)
	* Direct synthesis:		* Direct synthesis:
	: 2 Cs (s) + Br<sub>2</sub> (g) → 2 CsBr (s)		: 2 Cs (s) + Br<sub>2</sub> (g) → 2 CsBr (s)
	The direct synthesis is a vigorous reaction of caesium with ~~other halogens~~. Due to its ~~expensiveness~~, it is not used for preparation.		The direct synthesis is a vigorous reaction of caesium with bromine. Due to its high cost, it is not used for preparation.

	== Uses ==		== Uses ==
	Caesium bromide is sometimes used in optics as a ] component in wide-band ].		Caesium bromide is sometimes used in optics as a ] component in wide-band ].

	== ~~See also~~ ==		==References==
			{{Reflist}}<br/>* {{Webarchive\|url=https://web.archive.org/web/20121218002818/http://www.crystran.co.uk/caesium-bromide-csbr.htm \|date=2012-12-18 }}
	* ]

⚫	* ]
			==Cited sources==
	* ]
			*{{RubberBible92nd}}

	== External links ==		== External links ==
			{{Commons category\|Caesium bromide}}
	*
			* {{Webarchive\|url=https://web.archive.org/web/20071017044744/http://physchem.ox.ac.uk/MSDS/CA/caesium_bromide.html \|date=2007-10-17 }}
	* , ,
			* {{Webarchive\|url=https://web.archive.org/web/20121218002818/http://www.crystran.co.uk/caesium-bromide-csbr.htm \|date=2012-12-18 }},
	*
	*
	*
	*		*

	{{Caesium compounds}}		{{Caesium compounds}}
			{{Bromides}}
			{{Authority control}}

	]
	]		]
			]

		⚫	]
	]
	]
	]
	]
	]
	]
	]
	]

Latest revision as of 20:49, 12 May 2024

Caesium bromide
Names


IUPAC name Cesium bromide
Other names Cesium bromide, Caesium(I) bromide
Identifiers
CAS Number	7787-69-1
3D model (JSmol)	Interactive image
ChemSpider	22994
ECHA InfoCard	100.029.209
EC Number	232-130-0
PubChem CID	24592
RTECS number	FK9275000
UNII	06M25EDM3F
CompTox Dashboard (EPA)	DTXSID8064854
InChI InChI=1S/BrH.Cs/h1H;/q;+1/p-1Key: LYQFWZFBNBDLEO-UHFFFAOYSA-M InChI=1/BrH.Cs/h1H;/q;+1/p-1Key: LYQFWZFBNBDLEO-REWHXWOFAA
SMILES .
Properties
Chemical formula	CsBr
Molar mass	212.809 g/mol
Appearance	White solid
Density	4.43 g/cm
Melting point	636 °C (1,177 °F; 909 K)
Boiling point	1,300 °C (2,370 °F; 1,570 K)
Solubility in water	1230 g/L (25 °C) 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)
Magnetic susceptibility (χ)	-67.2·10 cm/mol
Refractive index (n_D)	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)
Structure
Crystal structure	CsCl, cP2
Space group	Pm3m, No. 221
Lattice constant	a = 0.4291 nm
Lattice volume (V)	0.0790 nm
Formula units (Z)	1
Coordination geometry	Cubic (Cs) Cubic (Br)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335
Precautionary statements	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)	2 0 0
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD₅₀ (median dose)	1400 mg/kg (oral, rat)
Related compounds
Other anions	Caesium fluoride Caesium chloride Caesium iodide Caesium astatide
Other cations	Sodium bromide Potassium bromide Rubidium bromide Francium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Y verify (what is ?) Infobox references

Chemical compound

Caesium bromide or cesium bromide is an ionic compound of caesium and bromine with the chemical formula CsBr. It is a white or transparent solid with melting point at 636 °C that readily dissolves in water. Its bulk crystals have the cubic CsCl structure, but the structure changes to the rocksalt type in nanometer-thin film grown on mica, LiF, KBr or NaCl substrates.

Synthesis

Caesium bromide can be prepared via following reactions:

Neutralization:

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 beamsplitter component in wide-band spectrophotometers.

References

^ Haynes, p. 4.57
Haynes, p. 4.132
Haynes, p. 10.240
Vallin, J.; Beckman, O.; Salama, K. (1964). "Elastic Constants of CsBr and CsI from 4.2K to Room Temperature". Journal of Applied Physics. 35 (4): 1222. Bibcode:1964JAP....35.1222V. doi:10.1063/1.1713597.
Caesium bromide. nlm.nih.gov
Schulz, L. G. (1951). "Polymorphism of cesium and thallium halides". Acta Crystallographica. 4 (6): 487–489. Bibcode:1951AcCry...4..487S. doi:10.1107/S0365110X51001641.

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

Cited sources

Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, Florida: CRC Press. ISBN 1-4398-5511-0.

External links

MSDS at Oxford University Archived 2007-10-17 at the Wayback Machine
Crystran Physical data Archived 2012-12-18 at the Wayback Machine, IR transmission spectrum
Ultra-violet photoabsorption measurements in alkali iodide and caesium bromide evaporated films

v t e Caesium compounds
CsBi₂ CsBr CsCl CsCN CsClO₄ Cs₂CrO₄ Cs₂CoF₆ Cs₂CuF₆ CsF CsH CsI CsI₃ CsLiB₆O₁₀ CsN₃ CsNO₃ CsOH Cs₂CO₃ CsHCO₃ Cs₂C₂O₄ Cs₂SO₄ Cs₂S Cs₂SeO₄ Cs₂Se CsC₂H₃O₂ Cs₂O Cs₂O₂ Cs₂P₅ Cs₂O₃ CsO₂ CsO₃ Cs₂Te Cs₂TiO₃ Cs₂WO₄ CsAu C₁₈H₃₅CsO₂ CsMnO₄ CsTcO₄ Cs₂B₁₂H₁₂ CsHSO₄ Cs₃Bi₂Br₉ CsXeF₇ Cs₂AgBiBr₆ Cs₂ZrO₃ AlCsF₅

Caesium compounds