Magnesium oxide
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 Magnesium oxide crystals - SEM image (1350x)
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| General | |
|---|---|
| Name | Magnesium oxide |
| Chemical formula | MgO |
| Appearance | White solid |
| Physical | |
| Formula weight | 40.30 g/mol |
| Melting point | 3073 K (2800 °C) |
| Boiling point | 3873 K (3600 °C) |
| Density | 3.58 kg/dm3 |
| Crystal structure | Cubic FCC |
| Solubility | 0.00062 g in 100 g water |
| Thermochemistry | |
| ΔfH0liquid | ? kJ/mol |
| ΔfH0solid | ? kJ/mol |
| S0solid | ? J/(mol·K) |
| Misc. | |
| Thermal conductivity | 42 W m-1 K-1 at 0 °C |
| Coefficient of thermal expansion | 10.8 ×10-6/K at 0 °C |
| Specific heat capacity | 877 J kg-1 K-1 |
| Dielectric constant | 9.65 at 1 MHz |
| Young's modulus | 250 GPa |
| Shear Modulus | 155 GPa |
| Bulk modulus | 155 GPa |
| Poisson's ratio | 0.18 |
| Safety | |
| Ingestion | No known effect. |
| Inhalation | Causes irritation of upper respiratory tract. |
| Skin | Causes irritation. |
| Eyes | Causes irritation. |
| SI units were used where possible. Unless otherwise stated, standard conditions were used. | |
Magnesium oxide is a white solid mineral that occurs naturally as periclase and is a source of magnesium. See also oxide.
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