|Vienna—Carl Auer von Welsbach elements
From Mosander’s “didymium,” the twin of lanthanum— the green twin, praseodymium, and the new twin, neodymium, two new elements— Carl Auer von Welsbach, midwife.
Atomic number 60
Whose oxide in glass shows a lavender hue in daylight but pale blue in fluorescent light. Filters out yellow light. Mixed with other rare earths in mischmetal. Alloyed with iron and boron makes strong permanent magnets.
A vast unrealized potential for crediting neodymium with unworldly properties may someday rival kryptonite. When we have mapped the universe we can go back and map it again having found a new universe in the shadow of the old one.