Actinium(III) chloride

Last updated
Actinium(III) chloride [1]
Other names
Actinium trichloride
Actinium chloride
3D model (JSmol)
PubChem CID
  • InChI=1S/Ac.3ClH/h;3*1H/p-3
  • [Cl-].[Cl-].[Cl-].[Ac]
Molar mass 333.378 g/mol
AppearanceWhite crystalline solid
Density 4.81 g/cm3
Melting point 1,051 °C (1,924 °F; 1,324 K)(sublimes)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Actinium(III) chloride is a chemical compound containing the rare radioactive element actinium. This salt has the formula AcCl3. Molecular weight of the compound is 333.378 g/mol. [2]


Actinium(III) chloride is made by reacting actinium hydroxide with carbon tetrachloride. [1]

4 Ac(OH)3 + 3 CCl4 → 4AcCl3 + 3CO2 + 6H2O

Related Research Articles

Actinium Chemical element, symbol Ac and atomic number 89

Actinium is a chemical element with the symbol Ac and atomic number 89. It was first isolated by Friedrich Oskar Giesel in 1902, who gave it the name emanium; the element got its name by being wrongly identified with a substance André-Louis Debierne found and called actinium. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Together with polonium, radium, and radon, actinium was one of the first non-primordial radioactive elements to be isolated.

The actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. The actinoid series derives its name from the first element in the series, actinium. The informal chemical symbol An is used in general discussions of actinoid chemistry to refer to any actinoid.

Praseodymium(III) chloride Chemical compound

Praseodymium(III) chloride is the inorganic compound with the formula PrCl3. It is a blue-green solid that rapidly absorbs water on exposure to moist air to form a light green heptahydrate.

Samarium(III) chloride Chemical compound

Samarium(III) chloride, also known as samarium trichloride, is an inorganic compound of samarium and chloride. It is a pale yellow salt that rapidly absorbs water to form a hexahydrate, SmCl3.6H2O. The compound has few practical applications but is used in laboratories for research on new compounds of samarium.

Europium(III) chloride Chemical compound

Europium(III) chloride is an inorganic compound with the formula EuCl3. The anhydrous compound is a yellow solid. Being hygroscopic it rapidly absorbs water to form a white crystalline hexahydrate, EuCl3·6H2O, which is colourless. The compound is used in research.

Chromium(III) chloride Chemical compound

Chromium(III) chloride (also called chromic chloride) describes any of several compounds of with the formula CrCl3 • xH2O, where x can be 0, 5, and 6. The anhydrous compound with the formula CrCl3 is a violet solid. The most common form of the trichloride is the dark green hexahydrate, CrCl3 • 6H2O. Chromium chlorides find use as catalysts and as precursors to dyes for wool.

Iridium(III) chloride Chemical compound

Iridium(III) chloride is the inorganic compound with the formula IrCl3. The anhydrous compound is relatively rare, but the related hydrate is useful for preparing other iridium compounds. The anhydrous salt is a dark green crystalline solid. More commonly encountered is the trihydrate IrCl3(H2O)3.

Gold(III) chloride Chemical compound

Gold(III) chloride, traditionally called auric chloride, is a chemical compound of gold and chlorine with the molecular formula Au2Cl6. The "III" in the name indicates the gold has an oxidation state of +3, which is typical for gold compounds. Gold(III) chloride is hygroscopic and decomposes in visible light. This compound is a dimer, which means that two identical subunits comprise each molecule. This compound has a variety of uses, such as catalyzing a variety of organic reactions.

Scandium chloride Chemical compound

Scandium(III) chloride is the inorganic compound with the formula ScCl3. It is a white, high-melting ionic compound, which is deliquescent and highly water-soluble. This salt is mainly of interest in the research laboratory. Both the anhydrous form and hexahydrate (ScCl3•6H2O) are commercially available.

Gallium trichloride Chemical compound

Gallium trichloride is the chemical compound with the formula GaCl3. Solid gallium trichloride exists as a dimer with the formula Ga2Cl6. It is colourless and soluble in virtually all solvents, even alkanes, which is truly unusual for a metal halide. It is the main precursor to most derivatives of gallium and a reagent in organic synthesis.

There are three sets of Indium halides, the trihalides, the monohalides, and several intermediate halides. In the monohalides the oxidation state of indium is +1 and their proper names are indium(I) fluoride, indium(I) chloride, indium(I) bromide and indium(I) iodide.

Americium(III) chloride Chemical compound

Americium(III) chloride or americium trichloride is the chemical compound composed of americium and chlorine with the formula AmCl3. It forms pink hexagonal crystals. In the solid state each americium atom has nine chlorine atoms as near neighbours, at approximately the same distance, in a tricapped trigonal prismatic configuration.

Lutetium(III) chloride Chemical compound

Lutetium(III) chloride or lutetium trichloride is the chemical compound composed of lutetium and chlorine with the formula LuCl3. It forms hygroscopic white monoclinic crystals and also a hydroscopic hexahydrate LuCl3·6H2O. Anhydrous lutetium(III) chloride has the YCl3 (AlCl3) layer structure with octahedral lutetium ions.

Thulium(III) chloride Chemical compound

Thulium(III) chloride or thulium trichloride is as an inoriganic salt composed of thulium and chlorine with the formula TmCl3. It forms yellow crystals. Thulium(III) chloride has the YCl3 (AlCl3) layer structure with octahedral thulium ions.

Actinium(III) oxide Chemical compound

Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium. It has the formula Ac2O3. It is similar to its corresponding lanthanum compound, lanthanum(III) oxide, and contains actinium in the oxidation state +3. Actinium oxide is not to be confused with Ac2O (acetic anhydride), where Ac is an abbreviation for acetyl instead of the symbol of the element actinium.

Actinium(III) fluoride Chemical compound

Actinium fluoride (AcF3) is an inorganic compound of actinium and fluorine.

Actinium(III) iodide is the a chemical compound of the radioactive salt actinium. It is a white crystalline solid. This compound was made by heating actinium oxide with a mixture of aluminum metal and iodine at 700°C for two hours.

Actinium(III) sulfide is the radioactive compound of actinium with the formula Ac2S3. This compound was prepared by heating actinium(III) oxalate at 1400°C for 6 minutes in a mixture of carbon disulfide and hydrogen sulfide. The result was conformed to be actinium(III) sulfide by x-ray diffraction.

Actinium(III) phosphate is a white-colored chemical compound of the radioactive element actinium. This compound was created by reacting actinium(III) chloride with monosodium phosphate. This resulted in the hemihydrate AcPO4·1/2H2O and was confirmed by x-ray diffraction. To become anhydrous, it was heated to 700°C, which resulted in a black solid due to impurities.

Actinium (III) nitrate is an inorganic compound, actinium salt of nitric acid with the chemical formula Ac(NO3)3. The compound looks like white substance, readily soluble in water.


  1. 1 2 Ltd, Mark Winter, University of Sheffield and WebElements. "WebElements Periodic Table » Actinium » actinium trichloride".
  2. Pubchem. "Actinium chloride".