The specific material is not simply preliminarily processedsilicasand.
The product is deeply processed from natural quartz sand and is a pure high-quality raw material with added value many times higher than raw silica sand and is applied in many hightechindustries.
Cristobalite material is a variant of quartz at high temperature,with the chemicalformulaSiO2,but has a different chemical structure than quartz stone.
GRANULOMETRIC DATA AND PHYSICAL CHARACTERISTICS
| No. | Content | Unit | Cristobalite powder | Cristobalite grits | Method |
| 1 | Density | kg/dm3 | 2.28 | 2.25 | |
| 2 | Bulk density | kg/dm3 | 0.68 | 1.00 | |
| 3 | Vibrating sieve | % | ≤ 20 µm: 86.23% | < 100 µm: 0.15% | |
| % | ≤ 32 µm: 96.19% | 100-400 µm: 99.77% | |||
| % | ≤ 45 µm: 99.01% | > 400 µm: 0.08% | |||
| 4 | Hardness | Mohs | 6.5 | 6.5 | |
| 5 | PH value | 9.1 | 9.1 | ||
| 6 | Colour: L* | 97.85 | 96.28 | X-Rite CI7800 | |
| a* | -0.05 | 0.04 |
| b* | 0.29 | 0.58 | |||
| 7 | Specific surface | m2/g | 1.0849 | 0.0674 | BET Blaine |
| 8 | Oil absorption | g/100g | 29.7 | - | |
| 9 | Moisture content | % | 0.2 | 0.14 | "Moisture balance MOC-120H" |
CHEMICAL ANALYSIS (XRF)
| No. | Chemical composition | unit | Cristobalite powder | Cristobalite grits |
| SiO2 | % | 99.03 | 99.34
| |
| Fe2O3 | % | 0.05 | 0.05 | |
| Al2O3 | % | 0.38 | 0.08 | |
| CaO | % | 0.00 | 0.03 | |
| K2O | % | 0.01 | 0.01 | |
| Na2O | % | 0.01 | 0.23 | |
| TiO2 | % | 0.00 | 0.00 |
