What is Yttrium?
Yttrium (symbol Y) is element 39 on the periodic table, a transition metal in period 5, group 3. A "rare earth" that is not actually rare, and the reason your phone screen glows the right colours. At room temperature it is a solid.
The story
What yttrium is, and how we found it
Yttrium is the silvery transition metal that powers red phosphors in television screens and creates the strongest magnets on Earth. Named after the Swedish village of Ytterby, which has the remarkable distinction of having four different elements discovered in minerals from its quarry, yttrium has become absolutely essential for modern high-tech applications despite being relatively unknown to the general public. Discovered in 1794 by Finnish chemist Johan Gadolin while analyzing a heavy black mineral from Ytterby, Sweden, yttrium was initially called "yttria" (its oxide form). The pure metal wasn't isolated until 1828 by Friedrich Wöhler, and high-purity yttrium only became available in the 1950s. This delay meant yttrium's incredible properties weren't fully exploited until the modern electronics age. What makes yttrium absolutely crucial is its role in creating yttrium aluminum garnet (YAG), one of the most important synthetic crystals ever developed. YAG crystals doped with rare earth elements create powerful lasers used for everything from industrial cutting to eye surgery. Neodymium-doped YAG (Nd:YAG) lasers can cut through steel or perform delicate retinal surgery with equal precision. Yttrium also revolutionized television technology. Yttrium oxide phosphors create the brilliant red color in cathode ray tube TVs and computer monitors. Before flat screens, every color TV contained yttrium compounds that glowed red when struck by electrons, making color television possible on a mass scale. Here's something extraordinary: yttrium barium copper oxide (YBCO) is a high-temperature superconductor that conducts electricity with zero resistance when cooled with liquid nitrogen. This "miracle material" opened up practical applications for superconductivity, from MRI machines to experimental magnetic levitation trains.
The discovery of yttrium
The Quarry Discovery
Johan Gadolin discovered yttrium in 1794 while analyzing gadolinite mineral from a quarry near Ytterby, Sweden. The village of Ytterby ultimately gave its name to four different elements: yttrium, ytterbium, erbium, and terbium.