Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Crystal_structure_of_boron-rich_metal_borides> ?p ?o }
- Crystal_structure_of_boron-rich_metal_borides abstract "Metals, and specifically rare-earth elements (RE), form numerous chemical complexes with boron. Their crystal structure and chemical bonding depend strongly on the metal element M and on its atomic ratio to boron. When B/M ratio exceeds 12, boron atoms form B12 icosahedra which are linked into a three-dimensional boron framework, and the metal atoms reside in the voids of this framework. Those icosahedra are basic structural units of most allotropes of boron and boron-rich rare-earth borides. In such borides, metal atoms donate electrons to the boron polyhedra, and thus these compounds are regarded as electron-deficient solids.The crystal structures of many boron-rich borides can be attributed to certain types including MgAlB14, YB66, REB41Si1.2, B4C and other, more complex types such as RExB12C0.33Si3.0. Some of these formulas, for example B4C, YB66 and MgAlB14, historically reflect the idealistic structures, whereas the experimentally determined composition is nonstoichiometric and corresponds to fractional indexes. Boron-rich borides are usually characterized by large and complex unit cells, which can contain more than 1500 atomic sites and feature extended structures shaped as \"tubes\" and large modular polyhedra (\"superpolyhedra\"). Many of those sites have partial occupancy, meaning that the probability to find them occupied with a certain atom is smaller than one and thus that only some of them are filled with atoms. Scandium is distinguished among the rare-earth elements by that it forms numerous borides with uncommon structure types; this property of scandium is attributed to its relatively small atomic and ionic radii. Crystals of the specific rare-earth boride YB66 are used as X-ray monochromators for selecting X-rays with certain energies (in the 1–2 keV range) out of synchrotron radiation. Other rare-earth borides may find application as thermoelectric materials, owing to their low thermal conductivity; the latter originates from their complex, \"amorphous-like\", crystal structure.".
- Crystal_structure_of_boron-rich_metal_borides thumbnail Yb66crystal.jpg?width=300.
- Crystal_structure_of_boron-rich_metal_borides wikiPageID "28574607".
- Crystal_structure_of_boron-rich_metal_borides wikiPageLength "75374".
- Crystal_structure_of_boron-rich_metal_borides wikiPageOutDegree "110".
- Crystal_structure_of_boron-rich_metal_borides wikiPageRevisionID "634213179".
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Allotropes_of_boron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Aluminium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Antiferromagnetism.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Atomic_radius.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Boride.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Boron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Boron_carbide.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Carbon.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Category:Borides.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Category:Crystallography.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Coulombs_law.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Crystal_structure.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Crystal_structure_of_boron-rich_metal_borides_(data_page).
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Cubic_crystal_system.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Cuboctahedron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Diamond.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Diamond_cubic.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Electrical_resistivity_and_conductivity.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Electron_deficiency.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Electron_diffraction.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Electron_microscope.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Ethane.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Europium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Extrinsic_semiconductor.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Gadolinium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Graphite.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Hexagonal_crystal_system.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Icosahedron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Ionic_radius.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Lutetium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Magnesium_diboride.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Metal.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Monochromator.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Neodymium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Nitrogen.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Octahedron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Orthorhombic_crystal_system.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Platinum.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Polyhedron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Raman_scattering.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Rare_earth_element.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Scandium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Seebeck_coefficient.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Silicon.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Space_group.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Synchrotron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Terbium.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Tetragonal_crystal_system.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Tetrahedron.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Thermal_conductivity.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Thermoelectric_materials.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Transmission_electron_microscopy.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Trigonal_crystal_system.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Variable-range_hopping.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink X-ray.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink X-ray_crystallography.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Yttrium_borides.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink Zone_melting.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig1.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig14.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig15.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig17.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig2.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig20.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig23.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig25.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig29.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig3.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Borfig5a.png.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLink File:Yb66crystal.jpg.
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLinkText "Crystal structure of boron-rich metal borides".
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLinkText "borides".
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLinkText "crystal structure of boron-rich metal borides".
- Crystal_structure_of_boron-rich_metal_borides wikiPageWikiLinkText "icosahedron-based borides".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 11. Structure unit of B4C and c-plane network of B12 icosahedra in the B4C structure. Fig. 13. B12 icosahedron network bridged by nitrogen and carbon atoms.".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 12. Stacking sequences of homologous icosahedron-based rare-earth borides and their HRTEM lattice images; B4C, REB15.5CN , REB22C2N and REB28.5C4 . Red circles are rare-earth atoms. HRTEM lattice images were obtained for YB15.5CN, YB22C2N and YB28.5C4 compounds.".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 19. Network of boron icosahedra, B22 unit network and overall crystal structure of ScB19+xSiy; pink and blue spheres indicate Sc and Si atoms, respectively.".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 21. ScB17C0.25 crystal structure viewed along the c-axis. Icosahedra I1 and I2 form a ring centered by a "tube". The "tube" structure that runs along the c-axis. Partial occupancies of B17 and B18 are ignored. Fig. 22. Experimental HRTEM lattice images and electron diffraction patterns taken along the [0001] and [11{{overline|2}}0] directions. Image simulations are added in the bottom-left insets, and a fragment of the crystal structure is also added to .".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 24. Supertetrahedron T, superoctahedron O and octahedral arrangement of the B10 polyhedra in the Sc0.83–xB10.0–yC0.17+ySi0.083–z crystal structure.".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 26. Sc4.5–xB57–y+zC3.5–z crystal structure viewed along the [010] direction; 2.5 and 2 unit-cell sizes are depicted along the x-axis and z-axis, respectively. Fig. 27. Two-dimensional presentation of supericosahedron connection in Sc4.5–xB57–y+zC3.5–z and YB66. The central icosahedra of the supericosahedron are dark green. Fig. 28. Locations of the I2 icosahedron in the 2-dimensional supericosahedron framework of Sc4.5–xB57–y+zC3.5–z.".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 30. Pillar-like structure unit P1 that consists of icosahedra I1 and I3, irregularly shaped B16 polyhedron and other bridge site atoms. Pillar-like structure unit P2 that consists of icosahedra I2, I5 and I6, B10 polyhedron and other bridge site atoms. Fig. 31. The sliced network structure of the cubic phase, and the -oriented boron network layer of the hexagonal phase.".
- Crystal_structure_of_boron-rich_metal_borides footer "Fig. 9. The boron network that consists of the icosahedra I1, I2 and I3 and is located at z = 0 plane. The icosahedron I4 lies above and below of this network at z = ± 0.25. The boron network that consists of the I5 icosahedron and B12Si3 polyhedron and is located at z = 0.5 plane. The icosahedron I4 lies above and below this network at z = 0.25 and 0.75. Fig. 10. The b-c network formed by icosahedra I4 and I2 as seen along the a-axis. The network is drawn within the range x = 0.09–0.41.".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig10.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig11a.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig11b.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig12a.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig12b.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig12c.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig12d.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig13.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig19a.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig19b.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig19c.png".
- Crystal_structure_of_boron-rich_metal_borides image "Borfig21a.png".