Chemical Properties of Iridium (CAS 7439-88-5)

InChI

InChI=1S/Ir

InChI Key

GKOZUEZYRPOHIO-UHFFFAOYSA-N

Formula

Ir

SMILES

[Ir]

Molecular Weight¹

192.22

CAS

7439-88-5

• EA : Electron affinity (eV).
• IE : Ionization energy (eV).
• P_vap : Vapor pressure (kPa).
• γ : Surface Tension (N/m).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
EA	[1.56; 1.57]	eV
EA	1.56 ± 0.00	eV	NIST
EA	1.57 ± 0.01	eV	NIST
IE	[8.80; 9.10]	eV
IE	9.10	eV	NIST
IE	9.10	eV	NIST
IE	8.87 ± 0.05	eV	NIST
IE	8.80 ± 0.70	eV	NIST
IE	9.10 ± 0.10	eV	NIST

Cheméo can also estimate Normal Boiling Point Temperature, Normal melting (fusion) point, Critical Temperature, Critical Pressure, Critical Volume, Enthalpy of formation at standard conditions, Enthalpy of vaporization at standard conditions, Standard Gibbs free energy of formation, Acentric Factor, Log10 of Water solubility in mol/l for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
γ	[2.21; 2.29]	N/m	[2373.00; 2833.00]
γ	2.29	N/m	2373.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.28	N/m	2423.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.27	N/m	2473.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.26	N/m	2523.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.25	N/m	2573.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.25	N/m	2623.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.24	N/m	2673.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.23	N/m	2723.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.22	N/m	2773.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
γ	2.21	N/m	2833.00	Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.00e-03; 99.99]	kPa	[2713.15; 4659.15]	The Yaws Handbook of Vapor Pressure
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			2.01687e+01
Coefficient B			-7.12296e+04
Coefficient C			-8.24700e+01
Temperature range, min.			2713.15
Temperature range, max.			4659.15
Pvap	1.00e-03	kPa	2713.15	Calculated Property
Pvap	7.82e-03	kPa	2929.37	Calculated Property
Pvap	0.05	kPa	3145.59	Calculated Property
Pvap	0.21	kPa	3361.82	Calculated Property
Pvap	0.81	kPa	3578.04	Calculated Property
Pvap	2.66	kPa	3794.26	Calculated Property
Pvap	7.65	kPa	4010.48	Calculated Property
Pvap	19.71	kPa	4226.71	Calculated Property
Pvap	46.22	kPa	4442.93	Calculated Property
Pvap	99.99	kPa	4659.15	Calculated Property

Sources

• Cheméo Relay (1.0, beta) Beta: served but experimental, data-limited and below our cross-validation release bar; the Joback value is recommended where available.
• Thermophysical Property Measurements of Liquid and Supercooled Iridium by Containerless Methods
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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