Chemical Properties of caesium (CAS 7440-46-2)

InChI

InChI=1S/Cs

InChI Key

TVFDJXOCXUVLDH-UHFFFAOYSA-N

Formula

Cs

SMILES

[Cs]

Molecular Weight¹

132.91

CAS

7440-46-2

Other Names

• CESIUM
• CESIUM-133

• EA : Electron affinity (eV).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• IE : Ionization energy (eV).
• P_vap : Vapor pressure (kPa).
• S°_{gas,1 bar} : Molar entropy at standard conditions (1 bar) (J/mol×K).
• S°_{solid,1 bar} : Solid phase molar entropy at standard conditions (J/mol×K).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
EA	[0.47; 0.47]	eV
EA	0.47 ± 0.00	eV	NIST
EA	0.47 ± 0.00	eV	NIST
EA	0.47 ± 0.00	eV	NIST
ΔfH°gas	76.50 ± 1.00	kJ/mol	NIST
IE	[3.89; 3.90]	eV
IE	3.89 ± 0.00	eV	NIST
IE	3.89	eV	NIST
IE	3.90	eV	NIST
IE	3.89	eV	NIST
IE	3.89	eV	NIST
IE	3.89 ± 0.00	eV	NIST
S°gas,1 bar	175.60 ± 0.00	J/mol×K	NIST
S°solid,1 bar	85.23 ± 0.40	J/mol×K	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.34e-07; 101.33]	kPa	[295.00; 944.15]	The Yaw...
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.33552e+01
Coefficient B			-8.09533e+03
Coefficient C			-1.75800e+01
Temperature range, min.			295.00
Temperature range, max.			944.15
Pvap	1.34e-07	kPa	295.00	Calculated Property
Pvap	5.52e-05	kPa	367.13	Calculated Property
Pvap	2.90e-03	kPa	439.26	Calculated Property
Pvap	0.05	kPa	511.38	Calculated Property
Pvap	0.39	kPa	583.51	Calculated Property
Pvap	1.95	kPa	655.64	Calculated Property
Pvap	7.07	kPa	727.77	Calculated Property
Pvap	20.23	kPa	799.89	Calculated Property
Pvap	48.46	kPa	872.02	Calculated Property
Pvap	101.33	kPa	944.15	Calculated Property

Sources

• Phase equilibria of the systems of CsCl + ErCl3 + H2O and CsCl + ErCl3 + HCl (~10.7%, ~14.4%) + H2O at T = 298.15 K and the standard molar enthalpies of formation of solid phase compounds
• A calorimetric investigation of A2[(UO2)2(WO5)O] compounds with A = K, Rb and Cs and calculated phase relations in the K2WO4-UO3-H2O and K2MoO4-K2WO4-UO3-H2O systems
• Synthesis and energetics of Na, K, Rb and Cs salts by reaction with 1,2-ethanediol and 1,4-butanediol
• Thermodynamic study of Cs3Na(MoO4)2: Determination of the standard enthalpy of formation and standard entropy at 298.15 K
• A calorimetric and thermodynamic investigation of cesium uranyl tungstate Cs8[(UO2)4(WO4)4(WO5)2]
• An experimental calorimetric and a DFT + U study of the thermodynamic properties of Cs4[(UO2)4(WO5)(W2O8)O2] and Cs4[(UO2)7(WO5)3O3]
• KDB
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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