Band
Title
167.0 cm-1: νL (Eg) of (CO3)2- in K2Ca(CO3)2 - phase alpha
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
νL (Eg) Eg libration (CO3)2- mode degeneracy double full
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)
167 ± 1 - - symmetric 0.125 m 295.0 1
Label
νL (Eg)
Symmetry
Eg
Category
rotation

Evaluation

Level
fully assigned
Evaluation
undefined
Comments
assignment from WURM database
# Multiplicity type Degeneracy Other band
1 mode degeneracy double
Contribution level
full

Rotation modes

Label (type)
νL (libration)
Comments
in-phase and out-of-plane torsion of CO32-

Phonon modes

Label (type)
νT (translation)
Comments
slight in-plane translation of CO32-
Composition
pure alpha-K2Ca(CO3)2, formed at 3GPa/975°C
Texture
crystal

Temperature

Temperature
295.0 ± 5.0 K

Pressure

Pressure
1 bar
Laser wavelength
532.0 nm
Sample orientation mode
unoriented
Method #1
spectrum measurement
Overlap
slightly blended
Peak
167 ± 1 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
symmetric
Evaluation
validated
Quality
undefined
Method
peak intensity
Relative intensity
0.125 ± 0.01
Strength
medium (m)
Evaluation
undefined
Quality
C