Chemical Properties of tungsten (CAS 7440-33-7)

InChI

InChI=1S/W

InChI Key

WFKWXMTUELFFGS-UHFFFAOYSA-N

Formula

W

SMILES

[W]

Molecular Weight¹

183.84

CAS

7440-33-7

Other Names

• wolfram

• η : Dynamic viscosity (Pa×s).
• EA : Electron affinity (eV).
• IE : Ionization energy (eV).
• P_vap : Vapor pressure (kPa).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
EA	[0.82; 0.82]	eV
EA	0.82 ± 0.00	eV	NIST
EA	0.82 ± 0.00	eV	NIST
EA	0.82 ± 0.01	eV	NIST
IE	[7.49; 7.98]	eV
IE	7.98	eV	NIST
IE	7.98	eV	NIST
IE	7.49 ± 0.08	eV	NIST
IE	7.98	eV	NIST
IE	7.98	eV	NIST

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
η	[0.0085000; 0.0167000]	Pa×s	[3155.00; 3695.00]
η	0.0167000	Pa×s	3155.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0157000	Pa×s	3200.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0146000	Pa×s	3250.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0137000	Pa×s	3300.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0128000	Pa×s	3350.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0120000	Pa×s	3400.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0113000	Pa×s	3450.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0106000	Pa×s	3500.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0100000	Pa×s	3550.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0094000	Pa×s	3600.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0091000	Pa×s	3634.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
η	0.0085000	Pa×s	3695.00	Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.00e-03; 101.33]	kPa	[3477.15; 5828.15]	The Yaws Handbook of Vapor Pressure
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			2.09719e+01
Coefficient B			-9.29967e+04
Coefficient C			-1.41510e+02
Temperature range, min.			3477.15
Temperature range, max.			5828.15
Pvap	1.00e-03	kPa	3477.15	Calculated Property
Pvap	7.57e-03	kPa	3738.37	Calculated Property
Pvap	0.04	kPa	3999.59	Calculated Property
Pvap	0.20	kPa	4260.82	Calculated Property
Pvap	0.77	kPa	4522.04	Calculated Property
Pvap	2.55	kPa	4783.26	Calculated Property
Pvap	7.42	kPa	5044.48	Calculated Property
Pvap	19.37	kPa	5305.71	Calculated Property
Pvap	46.11	kPa	5566.93	Calculated Property
Pvap	101.33	kPa	5828.15	Calculated Property

Mixtures

• tungsten + copper

Sources

• A calorimetric and thermodynamic investigation of potassium uranyl tungstate K2[(UO2)(W2O8)]
• Viscosity of molten Mo, Ta, Os, Re, and W measured by electrostatic levitation
• 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
• 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]
• Thermal conductivity of the tungsten-copper composites
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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