| Autor: |
Britvin, Sergey N., Kashtanov, Sergei A., Krzhizhanovskaya, Maria G., Gurinov, Andrey A., Glumov, Oleg V., Strekopytov, Stanislav, Kretser, Yury L., Zaitsev, Anatoly N., Chukanov, Nikita V., Krivovichev, Sergey V. |
| Zdroj: |
Angewandte Chemie International Edition; 11/23/2015, Vol. 54 Issue 48, p14340-14344, 5p |
| Abstrakt: |
The Group 18 elements (noble gases) were the last ones in the periodic system to have not been encountered in perovskite structures. We herein report the synthesis of a new group of double perovskites KM(XeNaO6) (M=Ca, Sr, Ba) containing framework‐forming xenon. The structures of the new compounds, like other double perovskites, are built up of the alternating sequence of corner‐sharing (XeO6) and (NaO6) octahedra arranged in a three‐dimensional rocksalt order. The fact that xenon can be incorporated into the perovskite structure provides new insights into the problem of Xe depletion in the atmosphere. Since octahedrally coordinated XeVIII and SiIV exhibit close values of ionic radii (0.48 and 0.40 Å, respectively), one could assume that XeVIII can be incorporated into hyperbaric frameworks such as MgSiO3 perovskite. The ability of Xe to form stable inorganic frameworks can further extend the rich and still enigmatic chemistry of this noble gas.Xenon, the noble gas, can play the role of a framework‐forming element in inorganic compounds, as is illustrated by the synthesis of a new family of double perovskites KM(XeNaO6) (M=Ca, Sr, Ba). The ability of xenon(VIII) to incorporate into stable inorganic frameworks might inspire new insights into the chemistry of this element as a crystal–chemical counterpart of group 4–5 transition metals: titanium, niobium, and tantalum. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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