| Revision as of 13:12, 15 February 2012 editBeetstra (talk | contribs)Edit filter managers, Administrators172,031 edits Saving copy of the {{chembox}} taken from revid 472640890 of page Samarium(III)_fluoride for the Chem/Drugbox validation project (updated: 'CASNo'). |
Latest revision as of 09:42, 28 January 2024 edit Ethmostigmus (talk | contribs)Extended confirmed users5,719 edits Open access status updates in citations with OAbot #oabotTag: OAbot [2.1] |
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{{ambox | text = This page contains a copy of the infobox ({{tl|chembox}}) taken from revid of page ] with values updated to verified values.}} |
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{{chembox |
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{{chembox |
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| Verifiedfields = changed |
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| Watchedfields = changed |
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| verifiedrevid = 464386809 |
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| verifiedrevid = 476999201 |
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| ImageFile = Kristallstruktur Yttrium(III)-fluorid.png |
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| ImageFile = Kristallstruktur Yttrium(III)-fluorid.png |
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| ImageSize = |
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| ImageSize = |
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| IUPACName = Samarium(III) fluoride |
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| IUPACName = samarium(III) fluoride |
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| OtherNames = Samarium trifluoride, Trifluorosamarium |
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| OtherNames = samarium trifluoride<br/>trifluorosamarium |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| CASNo_Ref = {{cascite|correct|CAS}} |
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| CASNo = 13765-24-7 |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID = 75536 |
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| ChemSpiderID = 75536 |
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| InChI = 1/3FH.Sm/h3*1H;/q;;;+3/p-3 |
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| InChI = 1/3FH.Sm/h3*1H;/q;;;+3/p-3 |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey = OJIKOZJGHCVMDC-UHFFFAOYSA-K |
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| StdInChIKey = OJIKOZJGHCVMDC-UHFFFAOYSA-K |
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| EINECS = 237-367-3 |
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| CASNo_Ref = {{cascite|changed|??}} |
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| PubChem = 83714 |
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| CASNo = <!-- blanked - oldvalue: 13765-24-7 --> |
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| EINECS = 237-367-3 |
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| SMILES = F(F)F |
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| PubChem = 83714 |
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| SMILES = F(F)F |
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| Section2 = {{Chembox Properties |
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|Section2={{Chembox Properties |
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| Formula = SmF<sub>3</sub> |
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| Formula = SmF<sub>3</sub> |
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| MolarMass = 207.36 g/mol |
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| MolarMass = 207.36 g/mol |
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| Appearance = Yellow odorless powder |
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| Appearance = Yellow odorless powder |
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| Density = 6.6 g/cm<sup>3</sup> at 20 °C |
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| Density = 6.6 g/cm<sup>3</sup> at 20 °C |
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| MeltingPt = 1306 °C |
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| MeltingPtC = 1306 |
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| BoilingPt = 2427 °C |
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| BoilingPtC = 2427 |
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| Solubility = Insoluble |
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| Solubility = Insoluble |
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}} |
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| Section3 = {{Chembox Structure |
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|Section3={{Chembox Structure |
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| CrystalStruct = ], ], SpaceGroup = Pnma, No. 62 |
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| CrystalStruct = ], ], SpaceGroup = Pnma, No. 62 |
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| Section7 = {{Chembox Hazards |
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|Section7={{Chembox Hazards |
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| MainHazards = |
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| MainHazards = |
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| RPhrases = {{R20/21/22}}, {{R36/37/38}} |
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| GHSPictograms = {{GHS06}}{{GHS07}} |
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| GHSSignalWord = Danger |
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| SPhrases = {{S9}}, {{S26}}, {{S36/37}} |
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| HPhrases = {{H-phrases|301|311|315|319|331}} |
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| FlashPt = |
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| PPhrases = {{P-phrases|261|264|270|271|280|301+310|302+352|304+340|305+351+338|311|312|321|322|330|332+313|337+313|361|362|363|403+233|405|501}} |
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| Autoignition = |
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| Section4 = {{Chembox Related |
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| OtherCpds = ] |
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| OtherAnions = ]<br/>]<br/>] |
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| OtherCations = ] |
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'''Samarium(III) fluoride''' (]]) is a slightly ] solid ]. Conditions/substances to avoid are: open ], moisture, strong ]s. |
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== Preparation == |
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Samarium(III) fluoride can be obtained by reacting SmCl<sub>3</sub> or Sm<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub> with 40% hydrofluoric acid:<ref>王亚军, 刘前, 索全伶, 等. 稀土氟化物的沉淀方法及组成研究. 稀土, 2000, 21(1):14-18.</ref> |
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:{{chem2|SmCl3 + 3 HF → SmF3↓ + 3 HCl}} |
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:{{chem2|Sm2(CO3)3 + 6 HF → 2 SmF3 + 3 H2O + 3 CO2↑}} |
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Samarium(III) fluoride can also be produced by hydrothermal reaction of ] and sodium fluroborate at 200 °C.<ref>孙元平, 贾佩云, 王芳, 等. 水热条件下稀土氟化物形貌的规律性生长. 中国陶瓷, 2013(6).</ref> |
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== Properties == |
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=== Chemical === |
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Samarium(III) fluoride reacts with some reducing agents at high temperatures to obtain ]: |
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: <math>\mathsf{ 4 SmF_3 + C \ \xrightarrow{2000^oC}\ 4 SmF_2 + CF_4 }</math> |
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: <math>\mathsf{ 2 SmF_3 + Sm \ \xrightarrow{1800^oC}\ 3 SmF_2 }</math> |
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=== Physical === |
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At room temperature, samarium(III) fluoride has ] structure with ] ''Pnma'' – β-YF<sub>3</sub> type with ]s ''a'' = 666,9 ], ''b'' = 705,9 pm, ''c'' = 440,5 pm. Above 495 °C, it has the ] ] structure (space group ''P3cl'') – with lattice constants ''a'' = 707, ''c'' = 724 pm.<ref>{{Cite journal |last1=Rotereau |first1=K |last2=Daniel |first2=Ph |last3=Desert |first3=A |last4=Gesland |first4=J Y |date=1998-02-16 |title=The high-temperature phase transition in samarium fluoride, : structural and vibrational investigation |url=https://iopscience.iop.org/article/10.1088/0953-8984/10/6/026 |journal=Journal of Physics: Condensed Matter |volume=10 |issue=6 |pages=1431–1446 |doi=10.1088/0953-8984/10/6/026 |bibcode=1998JPCM...10.1431R |s2cid=250841162 |issn=0953-8984|url-access=subscription }}</ref> |
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==References== |
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{{reflist}} |
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{{Samarium compounds}} |
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{{fluorides}} |
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{{Lanthanide halides}} |
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] |
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] |
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] |