Synthesis of the Clathrate-I Phase Ba<sub>8−<i>x</i></sub>Si<sub>46</sub> via Redox Reactions
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The clathrate-I phase Ba8−xSi46 (space group Pm3̅n) was synthesized by oxidation of Ba4Li2Si6 with gaseous HCl. Microcrystalline powders of the clathrate phase were obtained within a few minutes. The reaction temperature and the pressure of HCl were optimized to achieve good-quality crystalline products with a composition range of 1.3 < x < 1.9. The new preparation route presented here provides an alternative to the high-pressure synthesis applied so far.
创建时间：
2011-05-16
