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www.washingtonpost.com/news/speaking-of-science/wp/2015/07/...

Compounds made from hafnium and carbon have some of the highest known melting points. Using computer simulations, Brown University engineers predict that a material made with hafnium, nitrogen ...

www.wisegeek.com/which-material-has-the-highest-melting...

This is a difficult question to answer because new materials and alloys are being created all the time, and the material with the highest melting point now could change as new compounds are synthesized. Currently the record-holder is tantalum hafnium carbide (Ta4HfC5), a refractory compound with a melting point of 4488 K (4215 °C, 7619 °F). By mixing together various metals to create alloys ...

chemistry.stackexchange.com/questions/15119/how-to...

In general, ionic compounds will have higher boiling points than those of dipole-dipole interaction compounds. So, the compound above that will have the highest melting point will certainly be an ionic compound, either $\ce{NaCl}$, $\ce{CaF2}$ or $\ce{SrCl2}$.

sciencing.com/factors-affect-melting-point-8690403.html

A strong attraction between molecules results in a higher melting point. In general, ionic compounds have high melting points because the electrostatic forces connecting the ions – the ion-ion interaction – are strong. In organic compounds, the presence of polarity, especially hydrogen bonding, usually leads to a higher melting point.

en.wikipedia.org/wiki/Melting_point

The melting point of a pure substance is always higher and has a smaller range than the melting point of an impure substance or, more generally, of mixtures. The higher the quantity of other components, the lower the melting point and the broader will be the melting point range, often referred to as the "pasty range".

amrita.olabs.edu.in/?sub=73&brch=7&sim=33&cnt=1

The force of attraction between the molecules affects the melting point of a compound. Stronger intermolecular interactions result in higher melting points. Ionic compounds usually have high melting points because the electrostatic forces holding the ions (ion-ion interaction) are much stronger.

www.answers.com/Q/What_compound_has_the_highest_melting_point

Ionic compounds have higher melting points than covalent compounds. Common table salt, sodium chloride, is an ionic compound and has a melting point of 801 o C. Table sugar, sucrose, a covalent ...

www.reference.com/science/ionic-compounds-high-melting...

Ionic compounds have high melting and boiling points because the ionic bonds that hold the compounds together are very strong and require a great deal of energy to break apart. A higher temperature indicates that more energy is being used. This extra energy is needed to break the electrostatic attraction that is present in an ionic bond.

www.dailymail.co.uk/sciencetech/article-3178616/Have...

Compounds made from hafnium and carbon have some of the highest known melting points, so the engineers used computer simulations to calculate which hafnium alloys would have the highest melting ...

www.quora.com/Why-does-Ionic-compound-have-a-high-melting...

Ionic compound have high melting as well as high boiling point temperature because, The bond is formed between a metal and a non metal i.e., two oppositely charge elements( cations and anions) Thus, this would increase the force of attraction betw...