Tetrahedral Framework Structures: Polymorphic Phase Transition with Reorientation of Hexagonal Helical Channels in the Zintl Compound Na2ZnSn5 and Its Relation to Na5Zn2+xSn10-x.

2013

Two modifications of the new title compound, hP-Na2ZnSn5 (I) and tI-Na2ZnSn5 (II) are prepared from the elements at 450 and 300 °C, respectively.

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