| Chemical analysis | ||
| % | Typical | Guaranteed |
| Al2O3 | 78,83 | min. 77,5 |
| SiO2 | 13,46 | – |
| Fe2O3 | 2,29 | max. 2,50 |
| TiO2 | 3,43 | – |
| MgO | 0,10 | – |
| CaO | 0,26 | – |
| K2O | 0,41 | – |
| Na2O | 0,04 | – |
| Physical properties | |||
| Typical | Guaranteed | ||
| Bulk density | 3,10 | 3,00 | g/cm3 |
| Water absorption | 1,02 | – | % |
| Apparent porosity | 3 | – | % |
| Mineralogical composition | |
| Main phase | mullite > 85 % |
| Secondary phase | cristobalite traces |
| Other information |
| Calcined at temperatures between 1500 °C and 1550 °C. |