| Chemical analysis | ||
| % | Typical | Guaranteed |
| Al2O3 | 69,78 | min. 68,00 |
| SiO2 | 25,52 | – |
| Fe2O3 | 1,56 | max. 2,00 |
| TiO2 | 2,56 | – |
| MgO | 0,10 | – |
| CaO | 0,22 | – |
| K2O | 0,18 | – |
| Na2O | 0,05 | – |
| Physical properties | |||
| Typical | Guaranteed | ||
| Bulk density | 2,84 | 2,80 | g/cm3 |
| Water absorption | – | – | % |
| Apparent porosity | 3 | – | % |
| Mineralogical composition | |
| Main phase | mullite ≈ 85 – 90 % |
| Secondary phase | cristobalite traces |