Diamond has an extraordinarily high thermal conductivity given the fact that it is an excellent insulator. With reference to the derivation in Section 3.9, can you say something about diamond that leads it to have such a high value for thermal conductivity?

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3.9.1 DIELECTRIC MATERIALS The thermal conductivity of dielectric materials is due entirely to thermal vibrations of the crystal- line lattice. In amorphous materials, like glasses, an effective lattice size, on the order of a single sil- icon tetrahedron in a glass, or the chain spacing in a polymer, would be used. The lattice vibrations