Iridium
Element density: 22.65 g/cm3
Electron configuration: [Xe]4f145d76s2
Oxidation states: +3,4
Edges
Explore electron energy loss spectroscopy (EELS) reference spectra, featuring major and minor edges used for elemental identification and chemical state analysis in materials research.
Major edges | |||
|---|---|---|---|
L3 | 11215 |
|
|
M4 | 2116 |
|  |
M5 | 2040 |
| |
O2 | 63 |  | |
O3 | 51 | | |
Minor edges | |||
|---|---|---|---|
L1 | 13419 |
|
|
L2 | 12824 |
|
|
M1 | 3174 |
|
|
M2 | 2909 |
|  |
M3 | 2551 |  | |
N1 | 690 |
|  |
N2 | 577 | | |
N3 | 494 | | |
N4 | 311 |
|  |
N5 | 295 |
| |
N6 | 63 |
| |
N7 | 61 |
| |
O1 | 95 |
| |
Considerations
The M4,5-edge that shows both a strong cross-section and typically low background due to its high energy. To efficiently measure this edge, a large collection angle must be used. Some TEMs do not support high energy loss at short camera lengths due to cut off apertures in the column. Sudden drops in the power law background at high energy typically indicate cut off in the column.
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Related spectral data
IrO2 particle on holey C film (0 – 3870 eV)
Material analyzed: IrO2
Related elements: Iridium, Oxygen
Data contributor: Gatan
Beam energy (keV): 200
Nominal energy range (eV): 0 – 3870
Collection semi-angle effective (mrad): 100
Notes: Serial EELS; zero-loss peak intensity = 1.39e9; total elastic int. / zero-loss int. = 1.0; gain change factor = 712; 55 sweeps 20 ms dwell
