Table 1 The content of some elements (mas. %) at the different zones of solid samples and accompanied luminescence intensity
Si | C | O | K | Luminescence intensity | ||
|---|---|---|---|---|---|---|
1 | Zone 1, thick particles | 1.27 | 31.50 | 36.89 | 29.75 | Noticeable luminescence |
2 | Zone 2, small particles | 7.11 | 30.41 | 31.18 | 30.25 | No luminescence |
3 | Zone 3, dense “branches” | 1.07 | 49.85 | 8.68 | 38.27 | No luminescence |
4 | Zone 4, large particles | 0.68 | 65.00 | 30.00 | 4.32 | Noticeable luminescence |
5 | Zone 5, separated particles | 0.96 | 84.76 | 7.41 | 6.86 | Background luminescence |
6 | Zone 5, agglomerates (~5 μ) | 0.65 | 64.00 | 12.00 | 21.60 | Background luminescence |
7 | Zone 5, large particles | 0.26 | 96.20 | 2.32 | 1.06 | No luminescence |