Dysprosium hardness

Dysprosium, Dy Lutetium, Lu > L. de Boisbaudran G. Urbain 1886 Greek hvanpoaixog, dysprositos, hard to get... 

Dysprosium (Dy, [Xe]4/106s2), name and symbol after the the Greek word b uaTTpoaiTOs (dysprositos, hard to obtain). Discovered (1886) by Paul Emile Lecoq de Boisbaudran. 

Californium - the atomic number is 98 and the chemical symbol is Cf. The name derives from the state and the university of California, where the element was first synthesized. Although the earlier members of the actinide series were named in analogy with the names of the corresponding members of the lanthanide series, the only connection with the corresponding element dysprosium (Greek for hard to get at) that was offered by the discoverers was that searchers for another element (gold about a century before in 1849) foimd it difficult to get to California. An American scientific team at the University of California lab in Berkeley,... 

Dysprosium - the atomic number is 66 and the chemical symbol is Dy. The name derives from the Greek dysprositos for hard to get at , due to the difficulty in separating this rare earth element from a holmium mineral in which it was found. Discovery was first claimed by the Swiss chemist Marc Delafontaine in the mineral samarskite in 1878 and he called it philippia. Philippia was subsequently found to be a mixture of terbium and erbium. Dysprosium was later discovered in a holmium sample by the French chemist Paul-Emile Lecoq de Boisbaudron in 1886, who was then credited with the discovery. It was first isolated by the French chemist George Urbain in 1906. 

Dysprosium Dy 66 RE.Lecoq de Boisbaudran France Greek word "dysprositos" meaning "hard to obtain"... 

Dysprosium, taking its name from the Greek word dysprositos, meaning hard to obtain, is a metallic element, discovered, but not isolated, in 1886 in... 

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 ... 

Fig. 6.4. The relative magnetization of dysprosium, as measured by Graham et al. (1973) for various fields in the easy (a) and hard (f>) directions.

According to the systematic study by Ross (1967) of the effect of cold rolling on the hardness of yttrium and twelve of the lanthanide metals, the hardness of all metals except La, Nd, Er, Y, and perhaps Sm tends to increase rapidly during the initial 20-25 percent reduction. Further hardening does not occur until reductions of the order of 60 percent (see fig. 8.5). This is in agreement with the earlier work by Love (1960) on erbium and dysprosium shown in fig. 8.6. A comparison of the effect of 50 percent cold work by swaging (Love, 1959) or... 

Dysprosium (from Greek dysprositos, hard to obtain) 1886 P.-E. Lecoq de Boisbaudran, Paris (France)... 

Dysprosium P. Lecoq de Boisbaudran (French) (1886) (Greek) disprositos, hard to get at from the difficulty in isolating this element... 

Discovery Paul-Emile Lecoq de Boisbaudran in France in 1886 found a new element in the REM holmium, earlier discovered by Cleve. The discovery was hard work (dysprositos in Creek), so the new element was given the name dysprosium. 

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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