Samarium(III) bromide is a crystalline compound of one

samarium Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samar ...

and three

bromine Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest element in group 17 of the periodic table ( halogens) and is a volatile red-brown liquid at room temperature that evaporates readily to form a simi ...

atoms with the chemical formula of SmBr₃. Samarium(III) bromide is a dark brown powder at room temperature. The compound has a crystal structure isotypic to that of

plutonium(III) bromide Plutonium(III) bromide is an inorganic salt of bromine and plutonium with the formula PuBr3. This radioactive green solid has few uses, however its crystal structure is often used as a structural archetype in crystallography. Crystal structure ...

Preparation

SmBr₃·6H₂O can be crystallized by dissolving samarium oxide in 40%

hydrobromic acid Hydrobromic acid is a strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water. "Constant boiling" hydrobromic acid is an aqueous solution that distills at and contains 47.6% HBr by mass, which is 8.77 mol/L. ...

. The hydrate and ammonium chloride are heated in a

vacuum A vacuum is a space devoid of matter. The word is derived from the Latin adjective ''vacuus'' for "vacant" or " void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often di ...

to obtain the anhydrous form of samarium(III) bromide.林平娣, 吴国庆
无水三溴化钐和三溴化镱的制备
化学试剂, 1991(1):13-14.

Other compounds

Samarium(III) bromide forms some compounds with hydrazine, such as SmBr₃·3N₂H₄·H₂O which is a pale yellow needle-shaped crystal that is soluble in

water Water (chemical formula ) is an Inorganic compound, inorganic, transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living ...

and

ethanol Ethanol (abbr. EtOH; also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound. It is an alcohol with the chemical formula . Its formula can be also written as or (an ethyl group linked to a ...

but insoluble in

benzene Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms ...

, with d_20 °C = 3.147 g/cm³.Uchenye zapiski: Serii︠a︡ khimicheskikh nauk
(SM Kirov adyna Azărbai̐jan Dȯvlăt Universiteti; 1977), page 37. Retrieved 14 March 2021.

References

Bromides Samarium compounds Lanthanide halides {{Inorganic-compound-stub