| 词条 | Scandium dodecaboride |
| 释义 |
| verifiedrevid = 428756489 | ImageFile = ScB12structure.jpg | ImageSize = | IUPACName = scandium dodecaboride | OtherNames = | Section1 = {{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = | PubChem = | SMILES = }} | Section2 = {{Chembox Properties | Formula = ScB12 | MolarMass = 174.69 g/mol | Appearance = | Density = | MeltingPt = | BoilingPt = | Solubility = }} | Section3 = {{Chembox Structure | CrystalStruct = Tetragonal, tI26 | SpaceGroup = I4/mmm, No. 139 }} }} Scandium dodecaboride is a refractory metal boride. SynthesisScB12 is formed by mixing a 7:1 ratio of boron powder and scandium oxide powder, heating to 2500 °C with a plasma torch or similar, quenching in cold water and washing with concentrated hydrochloric acid.[1] CrystallographyScB12 was originally reported as having a cubic structure,[2] later studies showed it to have tetragonal structure (unit cell with a=522pm, c=735pm).[1] More recently it has been shown that there is indeed a cubic form but that it requires stabilization.[3] References1. ^1 {{cite journal |last=Matkovich |first=V.I.|author2=J Economy |author3=R F Giese Jr |author4=R Barrett |year= 1965 |title= The structure of metallic dodecaborides|journal= Acta Crystallogr.|volume=19 |pages=1056–1058 |doi=10.1107/S0365110X65004954|url=http://journals.iucr.org/q/issues/1965/12/00/a04941/a04941.pdf |accessdate=2008-08-28 |issue=6 }} {{Scandium compounds}}2. ^{{cite journal |last= Przybylska|first= Maria|author2=Allan H. Reddoch |author3=George J. Ritter |year= 1963 |title= The Preparation and Structure of Lutetium Diboride, Scandium Dodecaboride and Lutetium Antimonide |journal= J. Am. Chem. Soc.|volume=85|pages=407–411 |doi= 10.1021/ja00887a008 |issue= 4 }} 3. ^{{cite journal |last=Paderno |first=Y.|author2=N. Shitsevalova |year= 1995 |title= Stabilization of cubic scandium dodecaboride|journal= Journal of Alloys and Compounds|volume=219 |issue=1–2|pages=119–123|doi=10.1016/0925-8388(94)05048-1 }} 2 : Scandium compounds|Borides |
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