Table T9. Analytical conditions for major element analysis of glass beads on the Supermini (Rigaku) XRF spectrometer, Expedition 338.
| Element line | Filter | Crystal | Peak angle (°) | Count time (s) | BG 1 angle (°) | Count time (s) | BG 2 angle (°) | Count time (s) | Detector |
|---|---|---|---|---|---|---|---|---|---|
| Na-Kα | Out | RX25 | 47.125 | 40 | 49.000 | 10 | 45.250 | 10 | PC |
| Mg-Kα | Out | RX25 | 38.804 | 40 | 40.750 | 10 | 36.900 | 10 | PC |
| Al-Kα | Out | PET | 144.607 | 40 | 147.150 | 10 | 140.400 | 10 | PC |
| Si-Kα | Out | PET | 108.946 | 40 | 106.100 | 10 | 111.250 | 10 | PC |
| P-Kα | Out | PET | 89.280 | 40 | 91.350 | 10 | 87.200 | 10 | PC |
| K-Kα | A 140 | PET | 50.632 | 40 | 49.200 | 10 | PC | ||
| Ca-Kα | Out | PET | 45.154 | 40 | 43.650 | 10 | PC | ||
| Ti-Kα | Out | LiF1 | 86.155 | 20 | 85.240 | 10 | 87.120 | 10 | SC |
| Mn-Kα | Out | LiF1 | 62.997 | 20 | 62.200 | 10 | 63.820 | 10 | SC |
| Fe-Kα | Out | LiF1 | 57.535 | 20 | 58.180 | 10 | 56.900 | 10 | SC |
BG = background. PC = flow-proportioned counter, SC = scintillation counter.
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