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Nominal Composition of Vials Used
| Vial A | Vial B (uncoated) | Vial B (coated) | |
|---|---|---|---|
| Oxide | wt.% | wt.% | wt.% |
| SiO2 | 80.5 | 75.0 | 75.0 |
| B2O3 | 12.6 | 10.5 | 10.5 |
| Al2O3 | 2.2 | 5.0 | 5.0 |
| Na2O | 4.2 | 7.0 | 7.0 |
| K2O | <0.1 | – | – |
| CaO | <0.1 | 1.5 | 1.5 |
| Ammonium sulfate treated | Yes | No | No |
| Interior coating of SiO2 | No | No | Yes |
