Gadolinium(III) fluoride
{{Chembox
| Name = Gadolinium(III) fluoride
| ImageFile =
| ImageSize =
| ImageAlt =
| IUPACName = Gadolinium(III) fluoride
| IUPACNames =
| OtherNames = Gadolinium trifluoride
Gadolinium fluoride
| Section1 = {{Chembox Identifiers
| CASNo = 13765-26-9
| CASNo_Ref = {{cascite|correct|CAS}}
| PubChem = 10176739
| ChemSpiderID = 75538
| EINECS = 237-369-4
| StdInChI=1S/3FH.Gd/h3*1H;/q;;;+3/p-3
| StdInChIKey = TYIZUJNEZNBXRS-UHFFFAOYSA-K
| SMILES = F[Gd](F)F
}}
| Section2 = {{Chembox Properties
| Formula = GdF3
| MolarMass =
| Appearance = White crystalline powder
| Density = 7.09 g/cm3
| MeltingPt = 1,372 °C (2,502 °F; 1,645 K)
| BoilingPt =
| Solubility = }}
| Section4 = {{Chembox Hazards
| GHSPictograms = {{GHS07}}
| GHSSignalWord = Warning
| HPhrases = {{H-phrases|315|319|335}}
| ExternalSDS = [https://www.samaterials.es/tds/1716280665-vd0781.pdf Safety Data Sheet]
| NFPA-H = 1
| NFPA-F = 0
| NFPA-R = 0
}}
| Section8 = {{Chembox Related
| OtherAnions = Gadolinium(III) chloride
Gadolinium(III) bromide }}
}}
Gadolinium(III) fluoride is an inorganic compound with a chemical formula GdF3.
Preparation
Gadolinium(III) fluoride can be prepared by heating gadolinium oxide and ammonium bifluoride. The reaction involves two steps:郝占忠. 氟化氢铵氟化法合成氟化钆过程的基础研究[J]. 材料科学与工艺, 2010, 18(5):653-656.{{in lang|zh}}郝占忠, 王斌. Gd2O3－NH4HF2系制备氟化钆机制及工艺研究[J]. 稀有金属, 2007, 31(1):97-101.{{in lang|zh}}
: Gd2O3 + 6 NH4HF2 → 2 NH4GdF4 + 4 NH4F + 3 H2O
: NH4GdF4 → GdF3 + NH3 + HF
Alternatively, reacting gadolinium chloride with hydrofluoric acid and adding hot water produces GdF3·xH2O (x=0.53). Anhydrous gadolinium(III) fluoride can then be produced by heating the hydrate with ammonium bifluoride; without the bifluoride, GdOF is formed instead.郝占忠. 湿法氟化制备水合氟化钆的脱水机制及其氧的行为[J]. 有色金属(冶炼部分), 2010(5):36-39. {{in lang|zh}}
: GdCl3 + 3 HF + x H2O → GdF3·xH2O + 3 HCl
Properties
Gadolinium(III) fluoride is a white solid that is insoluble in water. It has an orthorhombic crystal structure with the space group Pnma (space group no. 62).{{Cite book |last=Ans |first=Jan d' |title=Elemente, anorganische Verbindungen und Materialien |last2=Ans |first2=Jan d' |date=1998 |publisher=Verlag nicht ermittelbar |isbn=978-3-540-60035-0 |edition=4., neubearb. u. rev. Aufl |series=Taschenbuch für Chemiker und Physiker / D'Ans |location=Ort nicht ermittelbar}}
Uses
Gadolinium(III) fluoride is used to produce fluoride glasses.{{cite web|url=https://www.thermofisher.com/order/catalog/product/011293.09?SID=srch-srp-011293.09|title=Gadolinium(III) fluoride|website=Thermo Scientific Chemicals}}
References
{{reflist}}
{{gadolinium compounds}}
{{fluorides}}
{{Lanthanide halides}}