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The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
3695 K, melting point of tungsten; 3915 K, sublimation point of carbon; 4231 K, melting point of hafnium carbide; 4800 K, 10 MPa, triple point of carbon [3] 5000 K, 12 GPa melting point of diamond [4] 5100 K in cyanogen–dioxygen flame; 5516 K at dicyanoacetylene (carbon subnitride)–ozone flame; 5650 K at Earth's Inner Core Boundary; 5780 K ...
At lower temperatures conductivity becomes even better, and reaches 41,000 W/(m·K) at 104 K (−169 °C; −272 °F) (12 C-enriched diamond). [ 45 ] Diamond's high thermal conductivity is used by jewelers and gemologists who may employ an electronic thermal probe to distinguish diamonds from their imitations.
Above the graphite–diamond–liquid carbon triple point, the melting point of diamond increases slowly with increasing pressure; but at pressures of hundreds of GPa, it decreases. [14] At high pressures, silicon and germanium have a BC8 body-centered cubic crystal structure, and a similar structure is predicted for carbon at high pressures.
Melting points (in blue) and boiling points (in pink) of the first eight carboxylic acids (°C). For most substances, melting and freezing points are approximately equal. For example, the melting and freezing points of mercury is 234.32 kelvins (−38.83 °C; −37.89 °F). [2]
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This is a list of the various reported boiling points for the elements, with recommended values to be used elsewhere on Wikipedia. ... (diamond) use: 4300 K: 4027 °C ...