Dysprosium-transition metal

Similar results were obtained with erbium, dysprosium, and chromium vapors (104, 115). However, on deuterolysis, most transition metal cocondensates afforded mainly unlabeled propene with only two traces of propane and hexanes (104, 107, 110). The differing reactions of metal vapors with propene were interpreted in terms of a change in the [Pg.60]

Lanthanide series Lanthanides are silvery metals with relatively high melting points. Because there is so little variation in properties among inner transition metals, they are found mixed together in nature and are extremely hard to separate. The name of one lanthanide, dysprosium, comes from a Greek word meaning hard to get at. Lanthanide ores were first mined in Ytterby, Sweden. Which four elements are named for this town ... 

Five of the rare earth elements do not exhibit a high temperature phase transition while others have one or more transitions. However, several of the lanthanide metals undergo transitions below room temperature—cerium (2), terbium, dysprosium, and ytterbium—see Beaudry and Gsdmeidner (1978). 

The phase equilibria for the dysprosium-erbium system has been studied by Spedding et al. (1973). The metals used in the investigation were prepared by the calcium reduction of the fluoride of these metals. The reduced metals were purified by sublimation. Impurities present in their dysprosium (in at ppm) were 581 O, 189 C, 161 H, 46 N, 41 Fe and 20 each Cu and Ho. Impurities in their erbium (also in at ppm) were 368 O, 331 H, 145 Cu, 97 C, 60 Ta, 28 Y and 26 F. Great care was taken in the design of experimental equipment and research techniques to avoid error in the determination of melting points and transition temperatures. 

---