Melting Point of Common Oxides
The melting point of oxides can vary widely depending on the specific oxide compound and its composition. The following table provides a comprehensive list of melting point values for common oxides at 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)
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| Carbon dioxide (CO2) | -78 (sublimes) |
| Silicon dioxide (SiO2) | 1710 |
| Sulfur dioxide (SO2) | -75.5 |
| Nitrogen dioxide (NO2) | -11 |
| Carbon monoxide (CO) | -205 |
| Nitric oxide (NO) | -161 |
| Hydrogen peroxide (H2O2) | -0.42 |
| Aluminum oxide (Al2O3) | 2052 |
| Iron(III) oxide (Fe2O3) | 1539 |
| Iron(II) oxide (FeO) | 1377 |
| Copper(II) oxide (CuO) | 1326 |
| Zinc oxide (ZnO) | 1974 |
| Lead(II) oxide (PbO) | 887 |
| Magnesium oxide (MgO) | 2825 |
| Sodium oxide (Na2O) | 1275 (sublimes) |
| Potassium oxide (K2O) | 740 |
| Calcium oxide (CaO) | 2613 |
| Chromium(III) oxide (Cr2O3) | 2435 |
| Manganese(IV) oxide (MnO2) | 535 (decomposes) |
| Nickel(II) oxide (NiO) | 1955 |
| Tin(IV) oxide (SnO2) | 1630 |
| Mercury(II) oxide (HgO) | 500 (decomposes) |
| Barium oxide (BaO) | 1973 |
| Strontium oxide (SrO) | 2531 |
| Beryllium oxide (BeO) | 2578 |
| Titanium dioxide (TiO2) | 1843 |
| Vanadium(V) oxide (V2O5) | 681 |
| Chromium(VI) oxide (CrO3) | 197 |
| Manganese(II) oxide (MnO) | 1840 |
| Cobalt(II) oxide (CoO) | 1935 |
| Ruthenium(IV) oxide (RuO2) | 1200 (sublimes) |
| Rhodium(III) oxide (Rh2O3) | 1100 (decomposes) |
| Palladium(II) oxide (PdO) | 750 (decomposes) |
| Silver(I) oxide (Ag2O) | ≥ 200 (decomposes) |
| Indium(III) oxide (In2O3) | 1910 |
| Antimony(V) oxide (Sb2O5) | 380 (decomposes) |
| Tellurium dioxide (TeO2) | 733 |
| Iodine pentoxide (I2O5) | 300 (decomposes) |
| Ruthenium tetroxide (RuO4) | 25.4 |
| Osmium tetroxide (OsO4) | 41 |
| Perchloric acid (HClO4) | -112 |
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH).