EDS elemental analysis.
| Element | Weight% | Atomic% | Net int. | Error% |
|---|---|---|---|---|
| O K | 48.95 | 64.85 | 629.46 | 7.89 |
| Al K | 10.55 | 8.28 | 268.40 | 6.73 |
| Si K | 31.73 | 23.95 | 811.90 | 5.18 |
| Cu K | 8.77 | 2.92 | 49.10 | 10.80 |
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