Table 1 Analytical conditions for major elements and trace F and Cl in olivine by EPMA
From: High precision measurement of trace F and Cl in olivine by electron probe microanalysis
Element | Calibration standard | Accelerating voltage (kV) | Beam current standard (nA) | Beam current sample (nA) | Beam size (jim) | Peak counting time (s) | Background counting time (s) | Analytical crystals | PHA mode (mV) | Bg-(Sinθ  * 105) | (Sinθ *  105) |
|---|---|---|---|---|---|---|---|---|---|---|---|
Si | Rhodonite | 20 | 30 | 30 | 5 | 20 | 20 | TAP | Base line: 1726 Window: 3274 | − 1500 | 1500 |
Ti | Pure TiO2 | 20 | 30 | 30 | 5 | 20 | 20 | LPET | Integral | − 500 | 500 |
Al | Pure AI2O3 | 20 | 30 | 30 | 5 | 20 | 20 | TAP | Base line: 1347 Window: 3464 | − 800 | 1000 |
Fe | Pure Fe2O3 | 20 | 30 | 30 | 5 | 60 | 60 | LIF | Integral | − 1000 | 1000 |
Mg | Pure MgO | 20 | 30 | 30 | 5 | 20 | 20 | TAP | Base line: 1004 Window: 3182 | − 2000 | 2000 |
Mn | Rhodonite | 20 | 30 | 30 | 5 | 10 | 10 | LIF | Integral | − 800 | 1000 |
Ca | Diopside | 20 | 30 | 30 | 5 | 10 | 10 | LPET | Integral | − 600 | 600 |
Na | Albite | 20 | 10 | 30 | 5 | 6 | 6 | TAP | Integral | − 800 | 800 |
K | K-feldspar | 20 | 10 | 30 | 5 | 10 | 10 | LPET | Integral | − 700 | 700 |
F | MgF2 | 20 | 10 | 800 | 5 | 240 | 240 | PC1 | Base line: 2300 Window: 2170 | 0 | 1100 |
Cl | Halite | 20 | 10 | 800 | 5 | 240 + 240 | 240 + 240 | 2 LPET | Integral | − 600 | 600 |