Thulium, including Technical Data, Safety Data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure,ionization energy, abundance on Earth, conductivity and thermal properties are included. Thulium is representative of the other lanthanides (rare earths) similar in chemistry to Yttrium. Thulium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Tm emits blue upon excitation. Flat panel screens depend critically on bright blue emitters. Also, under X-ray bombardment emissions are in both the 375 nm (ultra violet) and 465 (visible blue) wave lengths. This gives the material useful applications in low radiation detection for detection badges and similar uses. It is also used in other luminescence applications, such as halide discharge lamps. Flat panel screens depend critically on bright blue emitters.
Oxides are available in forms including powders and dense pellets for such uses ![]() Thulium is a Block F, Group 3, Period 6 element. The number of electrons in each of Thulium‘s shells is 2, 8, 18, 31, 8, 2 and its electronic configuration is [Xe]4f136s2. In its elemental form thulium‘s CAS number is 7440-30-4. The thulium atom has a radius of 172.4.pm and it‘s Van der Waals radius is unknown. Thulium is not toxic. ![]() Thulium, first discovered by Theodore Cleve in 1879, is found in small quantities in minerals such as monazite. Thulium is named after "Thule", which is the ancient name of Scandinavia. See Thuliumresearch below.
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