Chemical Properties of niobium (CAS 7440-03-1)

InChI

InChI=1S/Nb

InChI Key

GUCVJGMIXFAOAE-UHFFFAOYSA-N

Formula

Nb

SMILES

[Nb]

Molecular Weight¹

92.91

CAS

7440-03-1

• 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	0.89 ± 0.03	eV	NIST
IE	[6.61; 10.10]	eV
IE	6.76 ± 0.00	eV	NIST
IE	6.76	eV	NIST
IE	6.76 ± 0.00	eV	NIST
IE	6.61 ± 0.05	eV	NIST
IE	Outlier 10.10 ± 1.00	eV	NIST
IE	6.88	eV	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.00e-03; 99.99]	kPa	[2942.15; 5013.15]	The Yaw...
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			2.08389e+01
Coefficient B			-8.10265e+04
Coefficient C			-2.19300e+01
Temperature range, min.			2942.15
Temperature range, max.			5013.15
Pvap	1.00e-03	kPa	2942.15	Calculated Property
Pvap	7.59e-03	kPa	3172.26	Calculated Property
Pvap	0.04	kPa	3402.37	Calculated Property
Pvap	0.20	kPa	3632.48	Calculated Property
Pvap	0.77	kPa	3862.59	Calculated Property
Pvap	2.55	kPa	4092.71	Calculated Property
Pvap	7.38	kPa	4322.82	Calculated Property
Pvap	19.23	kPa	4552.93	Calculated Property
Pvap	45.63	kPa	4783.04	Calculated Property
Pvap	99.99	kPa	5013.15	Calculated Property

Sources

• Gibbs Energy of Formation of Eu3O4 and EuO
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more. Take the time to validate and double check the source of the data.
Outlier This icon means that the value is more than 2 standard deviations away from the property mean.