K feldspar EDS spectrum, 20 keV e- beam, Torpy et al. 2020
Measurement spectrum
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Measurement details
| Description | EDS spectrum of K feldspar, from the Tista River, Bangladesh |
| Reference | Torpy et al. 2020 Torpy, A., Wilson, N., MacRae, C., Pownceby, M., Biswas, P., Rahman, M., & Zaman, M. (2020). Deciphering the Complex Mineralogy of River Sand Deposits through Clustering and Quantification of Hyperspectral X-Ray Maps. Microscopy and Microanalysis, 26(4), 768-792 https://doi.org/10.1017/S143192762000135X |
| Date measured | 2018-05-07 |
| Material | K feldspar [ KAlSi3O8 ] |
| Analysis technique | Energy dispersive x-ray spectrometry (EDS) |
| Instrument | JEOL 8500F |
| Probe | 20 keV electron beam |
| Beam current | 69.95 nA |
| Probe diameter | 2 μm |
| Detector name | 2× Bruker XFLASH |
| Det. technology | Silicon drift detector (SDD) |
| Takeoff angle | 40° |
| Max. throughput | 260 kcounts/s |
| Real time | 0.414621 s |
| Live time | 0.262 s |
| Dead time | 36.8098 % |
| Channel count | 4096 |
| Energy range | -477.548 … 19994.5 eV |
| Gain | 4.99928 eV/channel |
| Intensity range | 2026 counts |
| Integral | 91281 counts |
Specimen details
Specimen image
Image of a specimen of Zircon from Tista River, Bangladesh
© (C) 2020 CSIRO Mineral Resources
Composition
| Element | Atoms | At% | Wt% |
|---|---|---|---|
| K | 1 | 7.69 | 14 |
| Al | 1 | 7.69 | 9.69 |
| Si | 3 | 23.1 | 30.3 |
| O | 8 | 61.5 | 46 |