Band
Title
107.0 cm-1: νLT (Eg) of (CO3)2- & K⁺ in K2Ca(CO3)2 - phase alpha
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
νLT (Eg) Eg unknown (CO3)2-
K⁺
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)
107 ± 1 - - undefined 0.005 vvw 295.0 1
Label
νLT (Eg)
Symmetry
Eg
Category
unknown

Evaluation

Level
uncertain assignment
Evaluation
undefined
Comments
assignment from WURM database
# Multiplicity type Degeneracy Other band
1 mode degeneracy double
Contribution level
full
Primary specie
(CO3)2-
Primary specie
K⁺

Rotation modes

Label (type)
νL (libration)
Comments
slight out-of-plane rotation of CO32-

Phonon modes

Label (type)
νT (translation)
Comments
out-of-phase and in-plane translation of CO32- and out-of-phase translation of K⁺
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
moderately blended
Peak
107 ± 1 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
undefined
Evaluation
validated
Quality
undefined
Method
peak intensity
Relative intensity
0.005 ± 0.001
Strength
very very weak (vvw)
Evaluation
undefined
Quality
D