Science, Space and Technology News 2024
A team from the U.S. Department of Energy’s Oak Ridge National Laboratory observed the bonding behavior of promethium in aqueous solution, a first for this rare element. Promethium, a lanthanide, exhibited unique bond formations with oxygen, providing insight into lanthanide contraction and opening new research avenues into the chemistry of rare-earth metals. Credit: Jacquelyn DeMink, art; Thomas Dyke, photography; ORNL, U.S. Dept.
Bruce Ravel is shown at the Beamline for Materials Measurement. Credit: Kevin Coughlin/Brookhaven National LaboratoryPromethium is what is known as a “lanthanide” or “rare-earth metal.” This metal is one of 15 elements that occupy the lower portion of the periodic table and carry the atomic numbers 57 through 71. While these metals look and feel fairly similar to each other, they all have unique magnetic and electronic properties.
“To the best of our knowledge, this was the first time that anyone, anywhere, at any synchrotron measured the element promethium with XAS,” remarked Ravel. “We are the first people ever to see a spectrum like that, which just by itself was really, really cool. I’ve been doing research using XAS for a long time, and I’ve never seen anything that no one else has ever seen before.”
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