Band
Title
261.0 cm-1: νLT (Eg) of (CO3)2- & Na2+ in Eitelite
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
νLT (Eg) Eg translation (CO3)2-
Na2+
no
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)
261 ± 2 - 9.5 ± 0.5 symmetric 0.025 w 295.0 1
Label
νLT (Eg)
Symmetry
Eg
Category
phonon mode

Evaluation

Level
fully assigned
Evaluation
validated
Comments
from theoretical WURM database
# Multiplicity type Degeneracy Other band
1 no
Primary specie
(CO3)2-
Primary specie
Na2+

Rotation modes

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

Phonon modes

Label (type)
νT (translation)
Comments
CO32− in-plane translation + Na2+ translation
Composition
Na2Mg(CO3)2
Texture
crystal

Temperature

Temperature
295.0 ± 5.0 K

Pressure

Pressure
1 bar
Laser wavelength
532.0 nm
Sample orientation mode
unoriented
Method #1
various
Overlap
slightly blended
Peak
261 ± 2 cm-1 (various)
Evaluation
validated
Quality
B
Comments
shifted to 259 cm-1 with 7% Ca
FWHM
9.5 ± 0.5 cm-1 (fwhm)
Shape
symmetric
Evaluation
undefined
Quality
B
Method
peak intensity
Relative intensity
0.025 ± 0.005
Strength
weak (w)
Evaluation
undefined
Quality
D