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Thin aluminum foil strips tamped by polished glass plates were rapidly heated by means of a pulse current. The experimental technique has ensured a sufficiently homogeneous heating of the foil samples during continuous expansion from the liquid to gaseous state at a pressure of 7-60 kbar. Results on the electrical resistivity of aluminum were obtained in a density range extending from about the normal solid density down to a density 30 times less and in a temperature range from 6000 to 50 000 K. A dielectriclike dependence of the resistivity on temperature along isochore was observed at a density, which is 4 times less than the normal solid density. A maximum in the temperature dependence of the resistivity was detected along an isochore corresponding to a density that is 5.4 times less than the normal solid density. Present results confirm recent theoretical predictions based on finite-temperature density-functional theory about the behavior of the electrical resistivity of aluminum in the liquid and gaseous state.

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