WANTED FUGITIVE

No Survivers

Dysprosium

This element was found in 1886

Discovered by: Paul-Émile Lecoq de Boisbaudran

Origin of the name:

The name is derived from the Greek 'dysprositos', meaning hard to get.

INFO ON THIS FUGITIVE

Dysprosium was discovered in 1886 by Paul-Émile Lecoq de Boisbaudran at Paris. Its discovery came as a result of research into yttrium oxide, first made in 1794, and from which other rare earths (aka lanthanoids) were subsequently to be extracted, namely erbium in 1843, then holmium in 1878, and finally dysprosium. De Boisbaudran’s method had involved endless precipitations carried out on the marble slab of his fireplace at home.


Pure samples of dysprosium were not available until Frank Spedding and co-workers at Iowa State University developed the technique of ion-exchange chromatography around 1950. From then on it was possible to separate the rare earth elements in a reliable and efficient manner, although that method of separation has now been superseded by liquid-liquid exchange technology

IF FOUND, CONTACT MS.WESSON OR ME(KING DRE)

REPORT TO MS.WESSON CLASSROOM WHEN FOUND !

Where can it be found?

Group Lanthanides

Melting point 1412 oC, 2574 oF, 1685 K

Period 6

Boiling point 2567 oC, 4653 oF, 2840 K

Block f

Density (g cm-3) 8.55

Atomic number 66

Relative atomic mass 162.500

State at 20°C Solid

Key isotopes