Band
Title
183.0 cm-1: νT (Eg) of (CO3)2- in Siderite
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
νT (Eg) Eg translation (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)
183 ± 0.75 - 16 ± 0.5 asymmetric low frequency wing 0.095 m 0.18 m 295.0 1
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

Phonon modes

Label (type)
νT (translation)
Comments
CO32− translation
Composition
Fe>0.95, Mg<0.05, Mn<0.04
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
183 ± 0.75 cm-1 (fit peak)
Evaluation
validated
Quality
A
Comments
increases with Mg fraction
FWHM
16 ± 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
0.095 ± 0.025
Strength
medium (m)
Evaluation
validated
Quality
E
Comments
decreases with Mg fraction
Method
width x peak intensity
Relative intensity
0.18 ± 0.042
Strength
medium (m)
Evaluation
recommended
Quality
D
Comments
decreases with Mg fraction