Dysprosium magnetic susceptibility

Gadolinium and dysprosium, both elements of the lanthanide family, differ in the electronic occupancy of their f-shells. As a result, they are very similar chemically but very different magnetically. The relaxivity 1/Tx of Dy-DTPA is as low as 0.1 1/mol s However, dysprosium has a pronounced ability to influence transiently the residual magnetic susceptibility of tissues as it passes through. This effect of Dy-DTPA seems to be ideal for cerebral perfusion imaging and may be useful for the quantitation of partial occlusions and reperfusion. 

Figure 13.11. Room temperature gram magnetic susceptibilities, % of rare earth sol-gel materials as a function of the atomic number showing the expected trend for pure compounds A. %s correlate linearly with the susceptibilities of the pure oxides B. reflecting the stoichiometric similarity within each series of materials. Slopes are proportional to the relative abundance of the metal ions. Inset in A Polyurea-crosslinked dysprosium aerogel powder picked up by a 1-cm diameter Nd-Fe-B magnet.

Dysprosium is a metal with bright silver luster, relatively stable in air at room temperature. The element has a very high magnetic susceptibility, which means that it is markedly paramagnetic. For dysprosium there are only few applications. One important is its use, together with terbium, in magnetostrictive materials. 

Distillation, azeotropes, 6-177 to 195 Divergence, definition, A-68 to 74 DSC, definition, 12-1 to 4 DTA, definition, 12-1 to 4 Dubnium (element 105), 4-1 to 42,11-56 to 253 Dysprosium see also Elements electrical resistivity, 12-39 to 40 electron configuration, 1-18 to 19 heat capacity, 4-135 history, occurrence, uses, 4-1 to 42 ionization energy, 10-203 to 205 isotopes and their properties, 11-56 to 253 magnetic susceptibility, 4-142 to 147 molten, density, 4-139 to 141... 

---