Americium(III) chloride

{{Chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 477000816

| ImageFile = UCl3.png

| ImageFile_Ref = {{Chemboximage|correct|??}}

| ImageSize = 240px

| ImageName = Unit cell, ball and stick model of americium(III) chloride with a legend

| IUPACName = Americium(III) chloride

| SystematicName = Americium(3+) chloride

| OtherNames = Americium chloride

Americium trichloride

|Section1={{Chembox Identifiers

| CASNo = 13464-46-5

| CASNo_Ref = {{cascite|changed|??}}

| ChemSpiderID = 15964177

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| PubChem = 17815325

| SMILES = [Cl-].[Cl-].[Cl-].[Am+3]

| StdInChI = 1S/Am.3ClH/h;3*1H/q+3;;;/p-3

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = GQKWPBIZTINWCF-UHFFFAOYSA-K

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

}}

|Section2={{Chembox Properties

| Am=1 | Cl=3

| Appearance = Light red, opaque crystals

| Density = 5.87 g cm⁻³

| MeltingPtC = 715

| MeltingPt_ref = {{Citation|last1 = Perry|first1 = Dale L.|last2 = Phillips|first2 = Sidney L.|year = 1995

| title = Handbook of Inorganic Compounds|publisher = CRC Press|isbn = 0-8493-8671-3|pages = 15|url = https://books.google.com/books?id=0fT4wfhF1AsC&pg=PA15|access-date = 2008-06-25}}

| BoilingPtC = 850

| BoilingPt_ref = {{cite web|url= http://www.webelements.com/compounds/americium/americium_trichloride.html|title= Chemistry: Periodic Table: americium: compound data (americium (III) chloride)|access-date=2008-06-24|publisher= WebElements}}}}

|Section3={{Chembox Structure

| Coordination = Tricapped trigonal prismatic
(nine-coordinate)

| CrystalStruct = hexagonal (UCl₃ type), hP8

| SpaceGroup = P6₃/m, No. 176}}

| Section8 = {{Chembox Related

| Related_ref =

| OtherAnions =Americium(III) fluoride
Americium(III) bromide
Americium(III) iodide

| OtherCations =Plutonium(III) chloride
Curium(III) chloride
Europium(III) chloride

| OtherFunction =Americium(II) chloride

| OtherFunction_label =americium chlorides

| OtherCompounds =

}}

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Americium(III) chloride or americium trichloride is the chemical compound composed of americium and chlorine with the formula AmCl₃. This salt 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.L. B. Asprey, T. K. Keenan, F. H. Kruse: "Crystal Structures of the Trifluorides, Trichlorides, Tribromides, and Triiodides of Americium and Curium", Inorg. Chem. 1965, 4 (7), 985–986; {{doi|10.1021/ic50029a013}}.A. F. Wells: Structural Inorganic Chemistry 5th edition (1984) Oxford Science Publications, {{ISBN|0-19-855370-6}}.

The hexahydrate has a monocline crystal structure with: a = 970.2 pm, b = 656.7 pm and c = 800.9 pm; β = 93° 37'; space group: P2/n.John H. Burns, Joseph Richard Peterson: "The Crystal Structures of Americium Trichloride Hexahydrate and Berkelium Trichloride Hexahydrate", Inorg. Chem. 1971, 10 (1), 147–151; {{doi|10.1021/ic50095a029}}.