| Autor: |
Schwinghammer, Vanessa F., Gärtner, Stefanie |
| Zdroj: |
Inorganic Chemistry; October 2024, Vol. 63 Issue: 43 p20078-20082, 5p |
| Abstrakt: |
Investigations in the ternary system Cs–K–Tl resulted in the unexpected formation of new ternary thallides Cs7.29K5.71Tl13and Cs3.45K3.55Tl7. Single crystal X-ray structure analyses of both compounds reveal the presence of isolated Tl cluster units. Cs7.29K5.71Tl13crystallizes in the monoclinic space group C2/c(a= 30.7792(9) Å, b= 11.000(2) Å, c= 14.0291(4) Å, β = 112.676(4)°, Z= 4) and contains [Tl6]6–and [Tl7]7–clusters as thallium subunits. Cs3.45K3.55Tl7crystallizes in the tetragonal space group I41/a(a= 13.6177(2) Å, c= 25.5573(8) Å, Z= 8) and contains [Tl7]7–clusters exclusively. The formation of Cs7.29K5.71Tl13is obtained after slow cooling in addition to that of Cs3.45K3.55Tl7and can be suppressed by quenching the stoichiometric mixture. First dissolution experiments in liquid ammonia suggest thallium and amide as final oxidation products. Full relativistic band structure calculations of Cs4K3Tl7and Cs8K5Tl13showed a (pseudo) band gap around EFfor both compounds. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
