Apatite EDS spectrum, 20 keV e- beam, Torpy et al. 2020
Measurement details
| Description | EDS spectrum of apatite 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 | 2018-05-01 |
| Material | Apatite [ Ca5(PO4)3(OH, F, Cl) ] |
| Specimen | Tista 2020 D4 Shaker [CSIRO], Teesta River, Bangladesh |
| Technique | Energy dispersive x-ray spectrometry (EDS) |
| Instrument | JEOL 8500F |
| Probe | 20 keV electron beam |
| Beam current | 69.64 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 | 2225.61 s |
| Live time | 1339.53 s |
| Dead time | 39.8129 % |
| Channel count | 4096 |
| Energy range | -477.548 … 19989.5 eV |
| Gain | 4.99806 eV/channel |
| Intensity range | 7.2727×106 counts |
| Integral | 4.8446×108 counts |
| Related measurement | Apatite CL spectrum, 20 keV e- beam, Torpy et al. 2020 (co-measured) |
Composition
| Element | Atoms | At% | Wt% |
|---|---|---|---|
| Ca | 1.68 | 24.2 | 38.7 |
| Ti | 0.00145 | 0.021 | 0.04 |
| Fe | 0.00904 | 0.13 | 0.29 |
| P | 1 | 14.4 | 17.8 |
| O | 4.24 | 61.2 | 39 |
Measurement spectrum
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