Terbium electrical resistivity

The macro separation of stable isotopes on ion exchange columns. J. Chim. Phys. (France) 60, 89. with D.E. Hegland and S. Legvold, Magnetization and electrical resistivity of terbium single crystals. Phys. Rev, 131, 158-162,... 

Smidt (1962) and Smidt and Daane (1963) investigated electrical resistivity of several rare earth alloy systems and reported the existence of complete solubility in the terbium-lutetium system as confirmed by X-ray diffraction and resistivity methods. This result was not unexpected since these metals satisfy the Hume-Rothery requirements for formation of extensive solid solutions similar valence, electronegativities and crystal structures, and have a difierence in metalUc radii of less than 3%. 

Markova et al. (1967) investigated the terbium-yttrium system by means of microscopy, X-ray diffraction, thermal analysis, hardness and electrical resistance measurements. Their starting materials were distilled yttrium of 99.6 to 99.7 (wt )% purity and terbium of 98.5 to 99% purity. Impurities in their terbium included yttrium, gadolinium, dysprosium, calcium, copper, iron and tantalum. Both metals contained gaseous impurities. Alloys were melted in an arc furnace under a helium atmosphere and annealed at 850°C for 70hr. 

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