Die Kristallstruktur von Na3Ga8Sn3 und die Interpretation der Bindungsverhältnisse auf der Basis der Wadeschen Regeln und des Zintlkonzeptes / The Crystal Structure of Na3Ga8Sn3 and the Interpretation of its Chemical Bonding According to Wade’s Rules and the Zintl Concept

Abstract

The crystal structure of Na3Ga8Sn3 (a = 1532.7(7), b = 890.7(6), c = 1224.9(8) pm; β = 129.6(2)°, space group C2/m) contains Ga12 icosahedra and puckered layers of condensed sixmembered Ga/Sn rings, which are interconnected by additional Ga/Sn atoms to a three-dimen-sional framework. The Na content of the compound correlates with the number of electrons necessary for a stable electron configuration in the anionic partial structure.