Electrical resistivity

Units

10-8 Ohm m

The electrical resistivity, or specific resistance, ρ, is the resistance between the opposite faces of a metre cube of a material. The reciprocal of the electrical resistivity is the electrical conductivity. Values are affected by impurities. Values given in different sources vary considerably. Those given here are an average if there is no great consensus. Resistivity is temperature dependent. See the references for values at other temperatures. In some cases, resistivity depends upon in which direction along a single crystal the measurement is made.

image showing Electrical resistivity: period 5sp periodic periodicity for 5s and 5p chemical elements

Notes

Values are quoted at 293-298 K and are given in the SI units of Ohm m. Values are often quoted in micro ohm cm and to convert to these units, multiply by 100 000 000. Most numbers are probably reasonably accurate to 2 significant figures where quoted but it is clear that you should expect values to depend upon your particular sample.

Literature sources

  1. G.W.C. Kaye and T.H. Laby in Tables of physical and chemical constants, Longman, London, UK, 15th edition, 1993.
  2. A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data, Macmillan, London, UK, 1992.
  3. D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
  4. J.A. Dean (ed) in Lange's Handbook of Chemistry, McGraw-Hill, New York, USA, 14th edition, 1992.

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