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| Place of Origin: | Xinyang, Henan |
|---|---|
| Particle size: | 20-30 mesh |
| Density: | 2.2-4 g/cm3 |
| Expansion multiple: | 15-20 |
| Color: | white |
| Hardness: | 5.5-7 |
| Moisture content: | 2-6 % |
| SiO2 content: | 69-78 % |
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