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Specific surface area of initial silica materials.
| Specific Surface Area, m2/kg | Initial Silica Materials | ||
|---|---|---|---|
| Diatomite | Gaize | Microsilica | |
| by gas permeability method | 1134 | 2546 | 4497 |
| by the method of low-temperature nitrogen porosimetry | 70,800 | 86,800 | 27,700 |
