Scheelite EDS spectrum, 20 keV e- beam, Torpy et al. 2020
Measurement spectrum
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Measurement details
| Description | EDS spectrum of Scheelite 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 | Scheelite [ CaWO4 ] |
| 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 | 1.78134 s |
| Live time | 0.846 s |
| Dead time | 52.5077 % |
| Channel count | 4096 |
| Energy range | -477.548 … 19994.5 eV |
| Gain | 4.99928 eV/channel |
| Intensity range | 5785 counts |
| Integral | 458007 counts |
| Related measurement | Scheelite CL spectrum, 20 keV e- beam, Torpy et al. 2020 (co-measured) |
Specimen details
Specimen image
Image of a specimen of Zircon from Tista River, Bangladesh
© (C) 2020 CSIRO Mineral Resources
Composition
| Element | Atoms | At% | Wt% |
|---|---|---|---|
| Ca | 1 | 16.7 | 13.9 |
| W | 1 | 16.7 | 63.9 |
| O | 4 | 66.7 | 22.2 |