Melting point | 1840 °C | |
Boiling point | 2900 °C | |
density | 4.26 g/mL at 25 °C(lit.) | |
refractive index | 2.61 | |
Fp | 2500-3000°C | |
storage temp. | Store at +5°C to +30°C. | |
solubility | Practically insoluble in water. It does not dissolve in dilute mineral acids but dissolves slowly in hot concentrated sulfuric acid. |