Band
Title
1648.0 cm-1: ν4 of NH3 in natural NH3 - phase I
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
ν4 F deformation asym. NH3 NH3 NH3 mode degeneracy triple
Characteristics summary
Peak position
(cm-1)
Center position
(cm-1)
Width
(cm-1)
Shape Asymmetry factor Peak intensity
(cm-1)
Peak intensity relative Peak strength Integrated intensity
(cm-2)
Integrated intensity relative Integrated strength Temperature
(K)
Pressure
(bar)
1650 ± 1 - - asymmetric s 20.0
1648 ± 2 - 15 ± 1 asymmetric 1270 ± 50 0.026 s s 90.0
Label
ν4
Symmetry
F
Category
fundamental vibration

Evaluation

Level
fully assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 mode degeneracy triple

Vibration modes

Label (type)
ν4 (deformation asym.)       Bond: NH3
Comments
F
Texture
film

Temperature

Temperature
20.0 ± 10.0 K
Method #1
spectrum measurement
Overlap
moderately blended
Peak
1650 ± 1 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
asymmetric
Evaluation
undefined
Method
estimated
Strength
strong (s)
Evaluation
undefined
Texture
film

Temperature

Temperature
90.0 ± 15.0 K
Method #1
spectrum measurement
Overlap
moderately blended
Peak
1648 ± 2 cm-1 (peak)
Evaluation
validated
Quality
B
FWHM
15 ± 1 cm-1 (hwhm)
Shape
asymmetric
Evaluation
undefined
Quality
C
Method
baseline corrected peak intensity
Absorption coefficient
1270 ± 50 cm-1
Relative intensity
0.026 ± 0.001
Strength
strong (s)
Evaluation
undefined
Quality
B
Method
estimated
Strength
strong (s)
Evaluation
undefined