:Curium(III) fluoride

{{Expand language|topic=|langcode=cs|otherarticle=Fluorid curitý|date=January 2024}}

{{Chembox

|ImageFile = Kristallstruktur Lanthanfluorid.png

|ImageCaption = Crystal structure

|IUPACName = Curium(III) fluoride

|OtherNames = Curium trifluoride

|Section1 = {{Chembox Identifiers

|CASNo = 13708-79-7

|PubChem = 101943145

|SMILES = F[Cm](F)F

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

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

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

|ChemSpiderID =57569004

}}

|Section2={{Chembox Properties

|Formula = CmF₃

|Appearance = Colorless solid

|Solubility = ~10 mg/L

|MeltingPt = 1406 ± 20 °C;

|MeltingPt_ref =

{{cite book

|title = The Chemistry of the Actinide and Transactinide Elements | url = https://archive.org/details/chemistryactinid00katz | url-access = limited |doi=10.1007/1-4020-3598-5_9

|editor1-last = Morss|editor2-first = Norman M.

|editor2-last = Edelstein

|editor3-last = Fuger|editor3-first = Jean

|last = Haire|first = Richard G.

|publisher = Springer Science+Business Media

|year = 2006

|isbn = 1-4020-3555-1

|location = Dordrecht, The Netherlands

|edition = 3rd

|page= [https://archive.org/details/chemistryactinid00katz/page/n1430 1417]|chapter=Curium (9.7.3 Halides)}}

}}

|Section3={{Chembox Structure

|CrystalStruct = Rhombohedral, hR24

|SpaceGroup = P{{overline|3}}c1, No. 165{{cite journal|doi=10.1103/PhysRevB.28.2317|title=Magnetic properties of actinide elements having the 5f⁶ and 5f⁷ electronic configurations|journal=Physical Review B|volume=28|issue=5|pages=2317|year=1983|last1=Nave|first1=S. E.|last2=Haire|first2=R. G.|last3=Huray|first3=Paul G.}}

|LattConst_a = 0.7012 nm

|LattConst_c = 0.7198 nm

|UnitCellFormulas = 6

|UnitCellVolume =0.30650

}}

|Section4={{Chembox Thermochemistry

|DeltaHf = −1660 kJ/mol

|Entropy = 121 J/mol·K

}}

}}

Curium(III) fluoride or curium trifluoride is the chemical compound composed of curium and fluorine with the formula CmF₃.{{cite book |last1=Macintyre |first1=Jane E. |title=Dictionary of Inorganic Compounds |date=23 July 1992 |publisher=CRC Press |isbn=978-0-412-30120-9 |page=3046 |url=https://books.google.com/books?id=9eJvoNCSCRMC&dq=Curicium+tetrafluoride&pg=PA3046 |access-date=27 June 2023 |language=en}} It is a white, nearly insoluble salt that has the same crystal structure as LaF₃. It precipitates as a hydrate when fluoride ions are added to a weakly acidic Cm(III) solution; alternatively it can be synthesized by reacting hydrofluoric acid with Cm(OH)₃. The anhydrous form is then obtained by desiccation or by treatment with hydrogen fluoride gas.