Rubidium electrical resistivity

The results have been reported of a comparative study of the measured electrical resistivities of liquid alkali metals and alloys, and the theoretical predictions for this quantity obtained within the diffraction model.48 The composition dependence of the Knight shifts in Na-Cs, Na-Rb, K-Rb-Cs, and Na-Rb-Cs liquid alloys has also been examined.49 Addition of small quantities of rubidium (0.3—4.51 atom %) to liquid sodium increases the electrical resistivity almost linearly with increasing solute concentration. With increasing temperature from 100 to 1100 °C, the effect of rubidium on the resistivity of sodium progressively diminishes.50 Addition of the solutes Hg, Tl, and Pb increases the resistivity of liquid potassium linearly with both increasing concentration and temperature. The unit increases in resistivity/pfl cm (atom%) , are 8.80, 9.85, and 15.8 for Hg, Tl, and Pb,... 

The electrical resistivity of mbidium, at 273 K, is 11.5xlO Om. Rubidium adopts the A2 structure with a cubic lattice parameter, oq, of 0.5705 nm. The velocity of electrons at the Fermi surface is 8.1 x 10 m s. Each mbidium atom contributes one electron to the stracture. Calculate the relaxation time, t, and the mean free path, A, of the electrons. Compare A with the interatomic spacing of mbidium atoms in the crystal. 

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