Synthesis and Characterization of the Largest Isolated Clusters of Tin, [Sn<sub>12</sub>]<sup>12-</sup>, in (AE)Na<sub>10</sub>Sn<sub>12</sub> (AE = Ca or Sr)
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Reported are two isostructural Zintl compounds, CaNa10Sn12 and SrNa10Sn12, with mixed alkali and alkaline-earth cations and isolated clusters of Sn1212- with the shape of giant truncated tetrahedra. The compounds were synthesized by heating the corresponding mixtures of elements at 950 °C. The structures were solved and refined from single-crystal X-ray diffraction data in the cubic space group I4̄3m (No. 217), where Z = 2 with a = 11.1847(6) and 11.2176(4) Å for CaNa10Sn12 and SrNa10Sn12, respectively. Both compounds are diamagnetic and therefore electronically balanced.
创建时间：
2016-08-17
