NaSn2: A novel binary Zintl phase with 2D polyanions of Realgar-type units [Sn8]4-

Franck Dubois, Martin Schreyer, Thomas F. Fässler

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Abstract

NaSn2, obtained from the reaction of stoichiometric amounts of the elements, crystallizes in a new structure type, in which two-dimensional polyanions are separated by Na+ cations. The tin framework is made up of Realgar-type Sn8 units. The density of states obtained from the TB-LMTO-ASA calculations with the implementation of the electron localization function (ELF) reveals that NaSn2 has all characteristics of a Zintl phase. Thus, the title compound can be written as (Na+) 4∞2[Sn84-]. NaSn2 dissolves readily in ethylenediamine, under the formation of a reddish brown solution indicative of the presence of [Sn9] 4- anions.

Original languageEnglish
Pages (from-to)477-479
Number of pages3
JournalInorganic Chemistry
Volume44
Issue number3
DOIs
StatePublished - 7 Feb 2005

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