Chemical Properties of rhodium (CAS 7440-16-6)

InChI

InChI=1S/Rh

InChI Key

MHOVAHRLVXNVSD-UHFFFAOYSA-N

Formula

Rh

SMILES

[Rh]

Molecular Weight¹

102.91

CAS

7440-16-6

Other Names

• rhodium black
• rhodium-103

• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (kJ/mol).
• 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
PAff	768.00	kJ/mol	NIST
BasG	745.40	kJ/mol	NIST
EA	[1.14; 1.14]	eV
EA	1.14 ± 0.00	eV	NIST
EA	1.14 ± 0.01	eV	NIST
IE	[7.10; 7.46]	eV
IE	7.46 ± 0.00	eV	NIST
IE	7.46	eV	NIST
IE	7.46 ± 0.00	eV	NIST
IE	7.20 ± 0.50	eV	NIST
IE	7.42 ± 0.08	eV	NIST
IE	7.10 ± 0.60	eV	NIST
IE	7.46	eV	NIST

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[9.03e-04; 101.33]	kPa	[2288.15; 3968.15]	The Yaw...
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			2.02860e+01
Coefficient B			-6.17869e+04
Coefficient C			-2.45600e+01
Temperature range, min.			2288.15
Temperature range, max.			3968.15
Pvap	9.03e-04	kPa	2288.15	Calculated Property
Pvap	7.22e-03	kPa	2474.82	Calculated Property
Pvap	0.04	kPa	2661.48	Calculated Property
Pvap	0.20	kPa	2848.15	Calculated Property
Pvap	0.79	kPa	3034.82	Calculated Property
Pvap	2.61	kPa	3221.48	Calculated Property
Pvap	7.58	kPa	3408.15	Calculated Property
Pvap	19.69	kPa	3594.82	Calculated Property
Pvap	46.52	kPa	3781.48	Calculated Property
Pvap	101.33	kPa	3968.15	Calculated Property

Sources

• Gibbs free energy of formation of rhodium sulfides
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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