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| Chemical Component | Typical Content | Description |
|---|---|---|
| SiO2 | 42% - 50% | Main silicate component |
| Al2O3 | 28% - 38% | Main alumina component |
| K2O | 7% - 11% | Typical mica alkali component |
| Fe2O3 | 1% - 6% | Affects color and mineral characteristics |
| MgO | 0.5% - 3% | Minor component |
| CaO | ≤ 2% | Minor component |
| Na2O | ≤ 1.5% | Minor alkali component |
| Loss on Ignition | 3% - 6% | Depends on raw material and processing |
The major components are Silicon Dioxide (SiO2 at 42% - 50%) and Aluminum Oxide (Al2O3 at 28% - 38%), which form the fundamental aluminosilicate framework.
Iron Oxide (Fe2O3) typically ranges between 1% and 6%, directly impacting the mineral's optical characteristics, coloration, and specialized thermal properties.
Potassium Oxide (K2O), present at 7% - 11%, acts as the standard interlayer alkali cation that stabilizes the characteristic sheet silicate structure of mica minerals.
Loss on Ignition (3% - 6%) measures the release of volatile substances and structural hydroxyl water when heated at high temperatures, reflecting processing conditions and raw purity.
Yes, minor oxides such as Calcium Oxide (≤ 2%) and Sodium Oxide (≤ 1.5%) are maintained at low thresholds to ensure consistency and reliable chemical stability.
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