Chemical Properties of germanium (CAS 7440-56-4)

InChI

InChI=1S/Ge

InChI Key

GNPVGFCGXDBREM-UHFFFAOYSA-N

Formula

Ge

SMILES

[Ge]

Molecular Weight¹

72.64

CAS

7440-56-4

• 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).
• c_sound,fluid : Speed of sound in fluid (m/s).
• 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	[1.23; 1.23]	eV
EA	1.23 ± 0.00	eV	NIST
EA	1.23 ± 0.00	eV	NIST
ΔfH°gas	372.00 ± 8.00	kJ/mol	NIST
IE	[7.80; 8.00]	eV
IE	7.90 ± 0.00	eV	NIST
IE	7.90	eV	NIST
IE	7.90	eV	NIST
IE	7.90 ± 0.00	eV	NIST
IE	7.80 ± 0.50	eV	NIST
IE	8.00 ± 0.30	eV	NIST
IE	7.90	eV	NIST
S°gas,1 bar	167.90 ± 0.01	J/mol×K	NIST
S°solid,1 bar	31.09 ± 0.15	J/mol×K	NIST

Cheméo can also estimate Normal Boiling Point Temperature, Normal melting (fusion) point, Critical Temperature, Critical Pressure, Critical Volume, 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
csound,fluid	[2652.50; 2700.40]	m/s	[1216.00; 1443.00]
csound,fluid	2690.90	m/s	1216.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2689.90	m/s	1216.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2690.80	m/s	1233.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2691.10	m/s	1233.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2689.50	m/s	1252.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2696.20	m/s	1252.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2692.00	m/s	1270.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2695.00	m/s	1270.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2690.80	m/s	1289.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2700.40	m/s	1289.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2690.60	m/s	1307.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2695.00	m/s	1307.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2673.60	m/s	1352.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2678.40	m/s	1352.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2662.80	m/s	1398.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2666.30	m/s	1398.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2652.50	m/s	1443.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
csound,fluid	2654.40	m/s	1443.00	Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.00e-03; 100.82]	kPa	[1644.15; 3106.15]	The Yaws Handbook of Vapor Pressure
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			1.73138e+01
Coefficient B			-3.90365e+04
Coefficient C			-3.25100e+01
Temperature range, min.			1644.15
Temperature range, max.			3106.15
Pvap	1.00e-03	kPa	1644.15	Calculated Property
Pvap	9.19e-03	kPa	1806.59	Calculated Property
Pvap	0.06	kPa	1969.04	Calculated Property
Pvap	0.28	kPa	2131.48	Calculated Property
Pvap	1.05	kPa	2293.93	Calculated Property
Pvap	3.35	kPa	2456.37	Calculated Property
Pvap	9.21	kPa	2618.82	Calculated Property
Pvap	22.47	kPa	2781.26	Calculated Property
Pvap	49.63	kPa	2943.71	Calculated Property
Pvap	100.82	kPa	3106.15	Calculated Property

Mixtures

• germanium + gallium
• yttrium + germanium + gallium
• germanium + manganese
• gadolinium + germanium + manganese

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.
• Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
• High temperature calorimetric examination of enthalpies of mixing in liquid (gadolinium germanium manganese) alloys
• Thermochemical properties of microporous materials for two borogermanates, .beta.-K2[B2Ge3O10] and NH4[BGe3O8]
• Thermodynamic properties of liquid germanium yttrium alloys
• Calorimetric study of enthalpies of mixing in liquid gallium germanium yttrium alloys
• KDB
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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