Thulium is a chemical element with the symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthanide series. 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. In aqueous solution, like compounds of other late lanthanides, soluble thulium compounds form coordination complexes with nine water molecules.
Iron(III) oxide-hydroxide or ferric oxyhydroxide is the chemical compound of iron, oxygen, and hydrogen with formula FeO(OH).
Indium(III) hydroxide is the chemical compound with the formula In(OH)3. Its prime use is as a precursor to indium(III) oxide, In2O3. It is sometimes found as the rare mineral dzhalindite.
Americium(III) hydroxide is a radioactive inorganic compound with the chemical formula Am(OH)3. It consists of one americium atom and three hydroxide groups. It was first discovered in 1944, closely related to the Manhattan Project. However, these results were confidential and were only released to the public in 1945. It was the first isolated sample of americium, and the first americium compound discovered.
Praseodymium(IV) oxide is an inorganic compound with chemical formula PrO2.
Thullium(III) fluoride is an inorganic compound with the chemical formula TmF3.
Terbium(IV) oxide is an inorganic compound with a chemical formula TbO2. It can be produced by oxidizing terbium(III) oxide by oxygen gas at 1000 atm and 300 °C.
Thorium(IV) hydroxide is an inorganic compound with a chemical formula Th(OH)4.
Cerium(IV) hydroxide, also known as ceric hydroxide, is an inorganic compound with the chemical formula Ce(OH)4. It is a yellowish powder that is insoluble in water but soluble in concentrated acids.
Praseodymium(III) hydroxide is an inorganic compound with a chemical formula Pr(OH)3.
Neodymium(III) hydroxide is an inorganic compound with the chemical formula Nd(OH)3.
Samarium(III) hydroxide is an inorganic compound with chemical formula Sm(OH)3.
Thulium(II) chloride is an inorganic compound with the chemical formula TmCl2.
Europium(III) hydroxide is an inorganic compound with a chemical formula Eu(OH)3.
Erbium(III) hydroxide is an inorganic compound with chemical formula Er(OH)3.
Dysprosium(III) hydroxide is an inorganic compound with the chemical formula Dy(OH)3.
Yttrium(III) hydroxide is an inorganic compound and an alkali with the chemical formula Y(OH)3.
Lutetium(III) hydroxide is an inorganic compound with the chemical formula Lu(OH)3.
Terbium(III) hydroxide is an inorganic compound with chemical formula Tb(OH)3.
Thulium(III) nitrate is an inorganic compound, a salt of thulium and nitric acid with the chemical formula Tm(NO3)3. The compound forms dark-green crystals, readily soluble in water, also forms crystalline hydrates.
