Band
Title
212.0 cm-1: νT (Eg) of (CO3)2- in Magnesite
Band type
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
νT (Eg) Eg transverse optic (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)
212 ± 1.5 - 3.5 ± 0.5 asymmetric low frequency wing 0.22 vs 0.06 m 295.0 1
Band assignment #1
Assignment
Label
νT (Eg)
Symmetry
Eg
Category
phonon mode

Evaluation

Level
fully assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 mode degeneracy double
Contribution level
full
Primary specie
(CO3)2-

Phonon modes

Label (type)
νT (transverse optic)
Comments
CO32− translation
Composition
Mg>0.95, Fe+Mn < 5%, Ca < 1%
Texture
crystal in plot

Temperature

Temperature
295.0 ± 5.0 K

Pressure

Pressure
1 bar
Laser wavelength
532.0 nm
Sample orientation mode
unoriented
Method #1
spectrum fit
Fit function
Gaussian
Overlap
isolated
Peak
212 ± 1.5 cm-1 (fit peak)
Evaluation
validated
Quality
B
Comments
increases with Mg fraction
FWHM
3.5 ± 0.5 cm-1 (fwhm)
Shape
asymmetric low frequency wing
Evaluation
validated
Quality
B
Comments
decreases with Mg fraction
Method
baseline corrected peak intensity
Relative intensity
0.22 ± 0.03
Strength
very strong (vs)
Evaluation
validated
Quality
D
Comments
increases with Mg fraction
Method
width x peak intensity
Relative intensity
0.06 ± 0.005
Strength
medium (m)
Evaluation
recommended
Quality
C
Comments
decreases with Mg fraction
Publications
SSHADE spectra