Editing Naphthalene (section)

=== Electrical conductivity ===
Pure crystalline naphthalene is a moderate insulator at room temperature, with [[resistivity]] of about 10<sup>12</sup> [[ohm|Ω]] [[metre|m]]. The resistivity drops more than a thousandfold on melting, to about 4 × 10<sup>8</sup> Ω m. Both in the liquid and in the solid, the resistivity depends on temperature as ''ρ'' = ''ρ''<sub>0</sub> exp(''E''/(''kT'')), where ''ρ''<sub>0</sub> (Ω⋅m) and ''E'' (eV) are constant parameters, ''k'' is the Boltzmann constant (8.617 × 10<sup>−5</sup> eV/[[kelvin|K]]), and ''T'' is absolute temperature (K). The parameter ''E'' is 0.73 in the solid. However, the solid shows semiconducting character below 100 K.<ref name="born1962">{{Cite journal |last=Bornmann |first=John A. |year=1962 |title=Semiconductivity of Naphthalene |url=https://pubs.aip.org/jcp/article/36/6/1691/205625/Semiconductivity-of-Naphthalene |journal=The Journal of Chemical Physics |language=en |volume=36 |issue=6 |pages=1691–1692 |bibcode=1962JChPh..36.1691B |doi=10.1063/1.1732805 |issn=0021-9606}}</ref><ref name="sche1978">{{Cite journal |last1=Schein |first1=L. B. |last2=Duke |first2=C. B. |last3=McGhie |first3=A. R. |year=1978 |title=Observation of the Band-Hopping Transition for Electrons in Naphthalene |url=https://link.aps.org/doi/10.1103/PhysRevLett.40.197 |journal=Physical Review Letters |language=en |volume=40 |issue=3 |pages=197–200 |bibcode=1978PhRvL..40..197S |doi=10.1103/PhysRevLett.40.197 |issn=0031-9007}}</ref>