Cryolite (Na₃AlF₆)
| Property | Unit | Typical | Specification |
|---|---|---|---|
| Na₃AlF₆ | % | 98 | Min |
| F | % | 53 | Min |
| Ratio (3NaF/AlF₃) | – | 1.4–1.5 | – |
| SiO₂ | % | 0.20 | Max |
| Fe₂O₃ | % | 0.05 | Max |
| CaO | % | 0.15 | Max |
| SO₃ | % | 0.15 | Max |
| Na₂O | % | 0.07 | Max |
| Al₂O₃ | % | 0.35 | Max |
| P₂O₅ | % | 0.01 | Max |
| L.O.I. at 550 °C – 1 hr | % | 0.40 | Max |
| Moisture (105–120 °C for 1 hr) | % | 0.20 | Max |
| Size 10–4 mm | % | 20 | Max |
| Size 4–1 mm | % | 70 | Max |
| Size <1 mm | % | 10 | Max |