Biotite EDS spectrum, 20 keV e- beam, Torpy et al. 2020
Measurement spectrum
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Measurement details
| Description | EDS spectrum of Biotite, 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 | Biotite [ K(Mg, Fe)3AlSi3O10(OH, F)2 ] |
| 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 |
| Takeoff angle | 40° |
| Max. throughput | 260 kcounts/s |
| Real time | 3.91587 s |
| Live time | 2.522 s |
| Dead time | 35.5954 % |
| Channel count | 4096 |
| Energy range | -477.548 … 19994.5 eV |
| Gain | 4.99928 eV/channel |
| Intensity range | 9797 counts |
| Integral | 824437 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% |
|---|---|---|---|
| H | 1.76 | 8.1 | 0.41 |
| K | 1 | 4.6 | 9.02 |
| Mg | 2.502 | 11.49 | 14.02 |
| Fe | 0.5 | 2.3 | 6.44 |
| Al | 1 | 4.59 | 6.22 |
| Si | 3.003 | 13.79 | 19.44 |
| O | 11.76 | 53.98 | 43.36 |
| F | 0.251 | 1.15 | 1.1 |