ID | Sample name | producing area | Density (g/cm3) | specific surface area (m2/g) | Hole Diameter &distribution μm) | ||
large | Middle | small | |||||
1 | craignurite | USA | 0.91 | 8.47 | 234~110 | 37~10.5 | 3.05~1.10 |
2 | rhyoandesite | Thera Qarry | 0.81 | 0.79 | 173~60 | 28.1~7.8 | 4.9~3.02 |
3 | trachyte | Italy | 0.62 | 8.04 | 202~64 | 27.9~6.6 | 4.17~1.45 |
4 | rhyolite | Nicaragua | 1.03 | 0.54 | 202~71 | 28.8~6.3 | 3.98~1.80 |
5 | rhyolite | Japan | 0.69 | 5.57 | 245~119 | 34.7~10.2 | 2.91~1.17 |
6* | rhyolite | China (Changbai Mountain) | 0.78 | 0.245 | 9.25~17.2 |