Caesium fluoride

Caesium fluoride
Names
	IUPAC name Caesium fluoride
	Other names Cesium fluoride
Identifiers
CAS Number	13400-13-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	24179 ;
ECHA InfoCard	100.033.156
EC Number	236-487-3;
PubChem CID	25953;
RTECS number	FK9650000;
UNII	T76A371HJR;
CompTox Dashboard (EPA)	DTXSID30893927 ;
	InChI InChI=1S/Cs.FH/h;1H/q+1;/p-1 Key: XJHCXCQVJFPJIK-UHFFFAOYSA-M ; InChI=1/Cs.FH/h;1H/q+1;/p-1 Key: XJHCXCQVJFPJIK-REWHXWOFAY;
	SMILES [F-].[Cs+];
Properties
Chemical formula	CsF
Molar mass	151.903 g/mol
Appearance	white crystalline solid
Density	4.64 g/cm3
Melting point	703 °C (1,297 °F; 976 K)
Boiling point	1,251 °C (2,284 °F; 1,524 K) (2,284 °F; 1,524 K)
Solubility in water	573.0 g/100 mL (25 °C)
Solubility	Insoluble in acetone, diethyl ether, pyridine and ethanol; 191 g/100 mL in methanol.
Basicity (pKb)	−744 kJ/mol
Magnetic susceptibility (χ)	-44.5·10−6 cm3/mol
Refractive index (nD)	1.477
Structure
Crystal structure	cubic, cF8
Space group	Fm3m, No. 225
Lattice constant	a = 0.6008 nm
Lattice volume (V)	0.2169 nm3
Formula units (Z)	4
Coordination geometry	Octahedral
Dipole moment	7.9 D
Thermochemistry
Heat capacity (C)	51.1 J/mol·K
Std molar; entropy (S⦵298)	92.8 J/mol·K
Std enthalpy of; formation (ΔfH⦵298)	-553.5 kJ/mol
Gibbs free energy (ΔfG⦵)	-525.5 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H311, H315, H318, H331, H361f
Precautionary statements	P201, P202, P260, P261, P264, P270, P271, P280, P281, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P310, P311, P312, P321, P322, P330, P332+P313, P361, P362, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)	3 0 0
Flash point	Non-flammable
Safety data sheet (SDS)	External MSDS
Related compounds
Other anions	Caesium chloride; Caesium bromide; Caesium iodide; Caesium astatide
Other cations	Lithium fluoride; Sodium fluoride; Potassium fluoride; Rubidium fluoride; Francium fluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Caesium fluoride (cesium fluoride in American English) is an inorganic compound with the formula CsF. A hygroscopic white salt, caesium fluoride is used in the synthesis of organic compounds as a source of the fluoride anion.^[5] The compound is noteworthy from the pedagogical perspective as caesium also has the highest electropositivity of all commonly available elements and fluorine has the highest electronegativity.

^ ^a ^b ^c ^d Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.57. ISBN 1-4398-5511-0.
^ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.132. ISBN 1-4398-5511-0.
^ ^a ^b ^c Davey, Wheeler P. (1923). "Precision Measurements of Crystals of the Alkali Halides". Physical Review. 21 (2): 143–161. Bibcode:1923PhRv...21..143D. doi:10.1103/PhysRev.21.143.
^ ^a ^b ^c ^d Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 5.10. ISBN 1-4398-5511-0.
^ Friestad, Gregory K.; Branchaud, Bruce P.; Navarrini, Walter; Sansotera, Maurizio (2007). "Cesium Fluoride". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rc050.pub2. ISBN 978-0-471-93623-7.

[crc-1] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.57. ISBN 1-4398-5511-0.

[2] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.132. ISBN 1-4398-5511-0.

[str-3] Davey, Wheeler P. (1923). "Precision Measurements of Crystals of the Alkali Halides". Physical Review. 21 (2): 143–161. Bibcode:1923PhRv...21..143D. doi:10.1103/PhysRev.21.143.

[b92t-4] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 5.10. ISBN 1-4398-5511-0.

[5] Friestad, Gregory K.; Branchaud, Bruce P.; Navarrini, Walter; Sansotera, Maurizio (2007). "Cesium Fluoride". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rc050.pub2. ISBN 978-0-471-93623-7.

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