| 词条 | Osmium borides |
| 释义 |
SynthesisOsmium borides are produced in vacuum or inert atmosphere to prevent formation of osmium tetroxide, which is a hazardous compound. Synthesis occurs at high temperatures (~1000 °C) from a mixture of MgB2 and OsCl3.[1] StructureThree osmium borides are known: OsB, Os2B3 and OsB2. The first two have hexagonal structure,[2] similar to that of rhenium diboride. Osmium diboride was first also sought as hexagonal,[3] but one of its phase's was later reassigned to orthorhombic.[1][4] In recent methods of synthesis, it has also been found that a hexagonal phase of OsB2 exists with a similar structure to ReB2.[5] References1. ^1 2 {{cite journal|last = Cumberland|first = Robert W.|date = April 27, 2005|title = Osmium Diboride, An Ultra-Incompressible, Hard Material|journal = Journal of the American Chemical Society|volume = 127|issue = 20|pages = 7264–5|doi = 10.1021/ja043806y|pmid = 15898746|display-authors=etal}} {{Osmium compounds}}{{DEFAULTSORT:Osmium Borides}}2. ^{{cite journal|author=M. Hebbache|doi=10.1016/j.ssc.2006.05.041|title=A new superhard material: Osmium diboride OsB2|year=2006|journal=Solid State Communications|volume=139|issue=5|pages=227–231|bibcode = 2006SSCom.139..227H |display-authors=etal}} 3. ^{{cite journal|doi=10.1063/1.1731807|title=Crystallography of the Ru-B and Os-B Systems|year=1961|last1=Kempter|first1=C. P.|last2=Fries|first2=R. J.|journal=The Journal of Chemical Physics|volume=34|issue=6|pages=1994|bibcode = 1961JChPh..34.1994K }} 4. ^{{cite journal|doi=10.1063/1.1733309|title=New Orthorhombic Phase in the Ru-B and Os-B Systems|year=1962|last1=Roof|first1=R. B.|last2=Kempter|first2=C. P.|journal=The Journal of Chemical Physics|volume=37|issue=7|pages=1473|bibcode = 1962JChPh..37.1473R }} 5. ^{{Cite journal|last=Xie|first=Zhilin|last2=Blair|first2=Richard G.|last3=Orlovskaya|first3=Nina|last4=Cullen|first4=David A.|last5=Andrew Payzant|first5=E.|date=2014-11-01|title=Thermal stability of hexagonal OsB2|url=http://www.sciencedirect.com/science/article/pii/S0022459614003405|journal=Journal of Solid State Chemistry|volume=219|pages=210–219|doi=10.1016/j.jssc.2014.07.035|bibcode=2014JSSCh.219..210X}} 3 : Osmium compounds|Borides|Superhard materials |
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