Band
Title
215.0 cm-1: νL,T (Ag) of (CO3)2- & Ca2+ and νL,T (B1g) of (CO3)2- in Aragonite
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
νL,T (Ag) Ag translation (CO3)2-
Ca2+
accidental degeneracy accidental double major
νL,T (B1g) B1g translation (CO3)2- accidental degeneracy accidental double minor
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)
215 ± 2 - 8 ± 1 unknown 0.022 w 0.1 m 295.0 1
219.5 ± 1 - 3.5 ± 1 unknown 0.023 w 0.065 m 80.0
Label
νL,T (Ag)
Symmetry
Ag
Category
phonon mode

Evaluation

Level
fully assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 accidental degeneracy accidental double
Contribution level
major
Primary specie
(CO3)2-
Primary specie
Ca2+

Rotation modes

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

Phonon modes

Label (type)
νT (translation)
Comments
Ca2+ translation + CO32− translation
Label
νL,T (B1g)
Symmetry
B1g
Category
phonon mode

Evaluation

Level
fully assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 accidental degeneracy accidental double
Contribution level
minor

Rotation modes

Label (type)
νL (libration)
Comments
CO32− libration

Phonon modes

Label (type)
νT (translation)
Comments
CO32− translation
Texture
single crystals and powders

Temperature

Temperature
295.0 ± 5.0 K

Pressure

Pressure
1 bar
Laser wavelength
514.5 nm
Sample orientation mode
unoriented
Method #1
various
Overlap
unknown
Peak
215 ± 2 cm-1 (various)
Evaluation
validated
Quality
B
Comments
weak B1g contribution at 213.9 cm-1
FWHM
8 ± 1 cm-1 (fit fwhm)
Shape
unknown
Evaluation
validated
Quality
C
Method
peak intensity
Relative intensity
0.022 ± 0.001
Strength
weak (w)
Evaluation
undefined
Quality
B
Method
extrapolated
Relative intensity
0.1 ± 0.001
Strength
medium (m)
Evaluation
undefined
Quality
A
Texture
single crystals and powders

Temperature

Temperature
80.0 ± 5.0 K
Laser wavelength
514.5 nm
Sample orientation mode
unoriented
Method #1
spectrum fit
Fit function
Voigt
Overlap
isolated
Peak
219.5 ± 1 cm-1 (fit peak)
Evaluation
validated
Quality
B
FWHM
3.5 ± 1 cm-1 (fit fwhm)
Shape
unknown
Evaluation
validated
Quality
C
Method
other
Relative intensity
0.023 ± 0.001
Strength
weak (w)
Evaluation
undefined
Quality
B
Method
fit integrated intensity
Relative intensity
0.065 ± 0.001
Strength
medium (m)
Evaluation
undefined
Quality
A