actinide

Massachusetts Institute of Technology (Boston, MA) has patented methods for separating isotopes of actinide elements such as uranium using microorganisms, e.

Refractory oxides of the lanthanide and actinide elements // High-Temp.

Vaseline glass is mildly radioactive, a property shared by all of the actinide elements, but the mystery element was banned for use as a coloring agent in the 1940s.

It's the first-ever compound containing both a noble gas and one of the periodic table's so-called actinide elements.

Several years later theorists predicted that lighter elements, such as dysprosium and other rare earths, could also assume a relatively stable, superdeformed shape if they were rapidly rotated; the rotational energy would play the same role as Coloumb interactions in the actinide elements.