Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)

Property	Value	Uncertainty	units	Reference	Comment

Information can also be found for this species in the NIST Chemistry Webbook

Vibrational levels (cm^-1)

Mode Number	Symmetry	Frequency (cm-1)	Frequency Reference	Intensity (km mol-1)	Int. unc.	Intensity Reference	Comment
1	Σ	124	webbook				we

vibrational zero-point energy: 62.1 cm^-1
Calculated vibrational frequencies for NaK (Sodium Potassium).

Rotational Constants (cm^-1)
See section I.F.4 to change rotational constant units

A	B	C	reference	comment
	0.09050		webbook

Calculated rotational constants for NaK (Sodium Potassium).

Product of moments of inertia
186.2722	amu Å2		3.09317E-38	gm cm2

Geometric Data

Point Group C_∞v

Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees

Description	Value	unc.	Connectivity				Reference	Comment
			Atom 1	Atom 2	Atom 3	Atom 4
rNaK	3.589	0.010	1	2			webbook	re

Cartesians

Atom	x (Å)	y (Å)	z (Å)
Na1	0.0000	0.0000	0.0000
K2	0.0000	0.0000	3.5890

Atom - Atom Distances
Distances in Å

	Na1	K2
Na1		3.5890
K2	3.5890

Calculated geometries for NaK (Sodium Potassium).

Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond

Bond Type	Count
Na-K	1

Connectivity

Atom 1	Atom 2
Na1	K2

Electronic energy levels (cm^-1)

Energy (cm-1)	Degeneracy	reference	description
0	1	webbook	1Σ

Ionization Energies (eV)

Ionization Energy	I.E. unc.	vertical I.E.	v.I.E. unc.	Electron Affinity	E.A. unc.	reference
4.416	0.000			0.465	0.030	webbook

Dipole, Quadrupole and Polarizability
Electric dipole moment

Dipole (Debye)	Reference	comment
2.667	webbook

Calculated electric dipole moments for NaK (Sodium Potassium).
Electric quadrupole moment
Calculated electric quadrupole moments for NaK (Sodium Potassium).

References
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squib	reference	DOI
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)

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