Naming: After Thule (A mythical region in Scandinavia) Discovery: Per Teodor Cleve (1879) Thulium Uses. Thulium History. Lump with interesting surface. melting point: 1,545 ° C boiling point: 1,950 ° C density: 9.32 g/cm 3 most common ion: Tm 2+, Tm 3+ Thulium is a silver-grey metal with a bright luster. 1.3 History. Only Tm-169 isotope of Thulium metal occur naturally. Thulium is among the most obscure elements in the periodic table. Element Thulium (Tm), Group 19, Atomic Number 69, f-block, Mass 168.934. 69. 1.3.1 Who Discovered. Both scientists discovered it by using the then-newly created flame spectroscopy method. Cost of Thulium Thulium is a bright, soft, malleable, silvery-gray metal. The metal tarnishes slowly in dry air to form the oxide and reacts with water to form the hydroxide and hydrogen gas. 99.95%. While it is the least abundant of all the lanthanides, or rare earth elements, new sources have been recently discovered, putting it on par with cadmium, silver and gold in terms of supply. Thulium is the least abundant of the rare earth elements, but with new sources recently discovered, it is now considered to be about as rare as silver, gold, or cadmium. Some people consider it the most useless of all naturally occurring elements, though others will rush to its defense. 1.2 Sources. It is the thirteenth and third-last element in the lanthanide series. It has very few applications. When bombarded in a nuclear reactor, thulium can be used as a radiation source in portable X-ray equipment. 70. Thulium metal can resist corrosion due to dry air . It is obtained commercially from monazite, which contains about 0.007% of the element. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds; because it occurs so late in the series, however, the +2 oxidation state is also stabilized by the nearly full 4f shell that results. Most of the world's current supply of thulium comes from from mines and refineries in China. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Interesting Facts. Thulium occurs in small quantities along with other rare earths in a number of minerals. Facts – Ytterbium Swedish chemist Per Theodor Cleve discovered the metal in 1879 while processing the ore erbia. The chemical symbol for Thulium is Tm.. Thulium is an easily workable metal with a bright silvery-gray luster. The element is sometimes represented by an image of a snow-covered mountain to indicate the origin of its name, suggesting a region far off to the north [1]. Found in Minerals, Mining, Ores of Minerals. It is a rare earth metal and is one of the least abundant. Facts – Thulium. One interesting thing about thulium is that it is the rarest of the rare earth elements. Thulium is a chemical element with the symbol Tm and atomic number 69. Talk about the confusion! It was found as a byproduct of sulfuric acid manufacturing. Thulium has been used to create lasers. 1.1 Interesting Facts. Thulium. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. What is Thulium. It is fairly soft and slowly tarnishes in air. Because of its softness and malleability, thulium can be easily cut with a knife [3]. Interesting Thallium Facts: Thallium was discovered by two scientists independently of each other, William Crookes and Claude-Auguste Lamy, in 1861. There are twenty-five different isotopes of thulium. Ed ordered this lump just because he heard it was the most useless element. Thulium is not widely used, since it is the least abundant of the lanthanide elements, although it does have some industrial applications. Thulium is identified with the symbol TM on the periodic table, and it has an atomic number of 69. Per Teodor Cleve. When irradiated in a nuclear reactor, thulium produces an isotope 169 Tm that emits x-rays.
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