Band
Title
505.0 cm-1: Fe2+-O⁻ excitation of Fe2+ & O⁻ in Siderite
Type
Raman scattering
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
Fe2+-O⁻ excitation ligand-to-metal charge-transfer Fe2+
O⁻
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)
505 ± 2 - 82 ± 3 asymmetric 0.015 vw 0.14 vs 295.0 1
Label
Fe2+-O⁻ excitation
Category
electronic transition

Evaluation

Level
uncertain assignment
Evaluation
undefined
Comments
also attributed to Fe2+ excitation by Farsang et al. 2018, with ref. to Popkow et al. 1972
# Multiplicity type Degeneracy Other band
1 no
Primary specie
Fe2+
Primary specie
O⁻

Electronic modes

Label (type)
Fe2+-O⁻ (ligand-to-metal charge-transfer)
Texture
single crystals and powders

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
unknown
Peak
505 ± 2 cm-1 (peak)
Evaluation
undefined
Quality
B
Comments
from Figure of Farsang et al. 2018
FWHM
82 ± 3 cm-1 (fwhm)
Shape
asymmetric
Evaluation
undefined
Quality
D
Method
peak intensity
Relative intensity
0.015 ± 0.005
Strength
very weak (vw)
Evaluation
undefined
Quality
E
Method
width x peak intensity
Relative intensity
0.14 ± 0.05
Strength
very strong (vs)
Evaluation
undefined
Quality
E