کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1330024 | 978938 | 2006 | 7 صفحه PDF | دانلود رایگان |
We report on the synthesis of MgB12Si2 the first ternary compound in the system B/Mg/Si. Yellow transparent single crystals were yielded from the elements at 1600 °C in h-BN crucibles welded in Ta ampoules. MgB12Si2 crystallizes orthorhombic in the space group Pnma with a=10.9797(11)Å, b=6.1098(7)Å, c=8.3646(12)Å and Z=4Z=4. The crystal structure is characterized by layers of B12 icosahedra, connected by isolated Si atoms to a three-dimensional framework. Mg atoms are placed in voids of the framework. Each icosahedron forms 8 B–Si bonds and 4 exohedral B–B bonds. The Si atoms are tetrahedrally coordinated by B atoms of the B12 icosahedra.
The crystal structure of MgB12Si2, the first ternary compound of the system Mg/B/Si, is characterized by layers of B12 icosahedra, connected by isolated Si atoms to a three dimensional framework. Mg atoms are placed in voids of the framework.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 179, Issue 6, June 2006, Pages 1623–1629