Handbook on the Physics and Chemistry of Rare Earths, 1st by J.-C. G. Bunzli, K.A. Gschneidner

By J.-C. G. Bunzli, K.A. Gschneidner

This quantity of the instruction manual illustrates the wealthy number of issues coated by means of infrequent earth technological know-how. 3 chapters are dedicated to the outline of stable kingdom compounds: skutterudites (Chapter 211), infrequent earth -antimony structures (Chapter 212), and infrequent earth-manganese perovskites (Chapter 214). different reports take care of strong country houses: one contribution contains details on current thermodynamic info of lanthanide trihalides (Chapter 213) whereas the opposite one describes optical houses of infrequent earth compounds stressed (Chapter 217). ultimately, chapters concentrate on resolution chemistry. The state-of-the-art in unraveling resolution constitution of lanthanide-containing coordination compounds by means of paramagnetic nuclear magnetic resonance is printed in bankruptcy 215. the potential for time-resolved, laser-induced emission spectroscopy for the research of lanthanide and actinide ideas is gifted and seriously mentioned in bankruptcy 216.

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The characteristic temperature, T ∗ , for the Yb valence fluctuations is estimated to be 50 K (see fig. 9a). 6 in good agreement with the value of Rw = 2 expected for a spin 1/2 Kondo effect. , 2001) and decreases to ≈ 40 µ cm at 2 K. Optical measurements also are able to directly measure the pseudogap, ∆ = 90 cm−1 , created by the hybridization between the Yb 4f states and the extended conduction band states (fig. 21). , 1987). The thermoelectric properties of YbFe4 Sb12 were investigated by Dilley et al.

26. ZT vs. , 2001). but in general these materials are limited by their κL values, which are significantly higher than the values for the antimonides. This is not surprising since a lower average mass usually implies a higher sound velocity and a higher κL . 3. Future of filled skutterudites as thermoelectrics The filled skutterudite antimonides appear to represent excellent examples of electron–crystal, phonon–glass materials. The incoherent rattling of the loosely bound lanthanide atoms in these materials is inferred from the large values of the ADP parameters obtained in single-crystal structure refinements.

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