Sr4Cu25.37(18)Sb12 and Eu4Cu26.06(13)Sb12: Copper-Rich Antimonide Intermetallics with Cage Structure
| Autor: | Baibiao Huang, Wen-jie Tan, Sheng-Qing Xia, Xutang Tao, Min Zhu, Zhen Wu |
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| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Materials science Intermetallic chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility Copper 0104 chemical sciences Metal Crystallography chemistry visual_art Antimonide visual_art.visual_art_medium General Materials Science Orthorhombic crystal system 0210 nano-technology Electron counting |
| Zdroj: | Crystal Growth & Design. 18:1722-1729 |
| ISSN: | 1528-7505 1528-7483 |
| Popis: | Two new copper-rich antimonide polar intermetallics, Sr4Cu25.37(18)Sb12 and Eu4Cu26.06(13)Sb12, were synthesized through high-temperature flux reactions, and their structures were accurately determined through the single-crystal X-ray diffraction technique. Sr4Cu25.37(18)Sb12 and Eu4Cu26.06(13)Sb12 crystallize in their own structure type with an orthorhombic space group Cmcm (No. 63) (cell parameters: a = 4.3200(7)/4.2874(7) A, b = 14.528(2)/14.611(2) A, c = 12.2594(19)/12.1946(19) A, respectively). The anionic frameworks of these compounds can be described as composed of 16-vertex Cu10Sb6 polyhedra, which form edge-sharing cages filled with the cations. A simple electron counting implies that the on-stoichiometric composition as Sr4Cu28Sb12 or Eu4Cu28Sb12 should be electron-precise; however, metallic conducting properties were suggested by the measured electrical transport properties as well as by the extensive Cu vacancies in the structure. Magnetic susceptibility measurements on Eu4Cu26.06(13)Sb12 indi... |
| Databáze: | OpenAIRE |
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