Ba5Ga4Se10: a new selenidogallate containing the novel [Ga4Se10](10-) anionic cluster with Ga in a mixed-valence state |
| |
| Authors: | Yin Wenlong Mei Dajiang Feng Kai Yao Jiyong Fu Peizhen Wu Yicheng |
| |
| Institution: | Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China. |
| |
| Abstract: | The new compound Ba(5)Ga(4)Se(10) has been synthesized for the first time. It crystallizes in the tetragonal space group I4/mcm with a = 8.752(2) ?, c = 13.971(9) ?, and Z = 2. The structure contains discrete Ga(4)Se(10)](10-) anions and charge-compensating Ba(2+) cations. The novel highly anionic Ga(4)Se(10)](10-) cluster is composed of two Ga(Se)(4) tetrahedra and two Ga(Ga)(Se)(3) tetrahedra with Ga in the 2+/3+ valence states. It also exhibits an unusually long Ga-Se distance of 2.705(2) ?, which has only been observed under high pressure conditions before. A band gap of 2.20(2) eV was deduced from the UV/vis diffuse reflectance spectrum. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
