1996
DOI: 10.1021/ja961975f
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Synthesis and Structure of NaGaSn2. A Zintl Phase with a Helical Framework Structure

Abstract: A new Zintl phase NaGaSn2 is obtained pure from stoichiometric reactions of the elements in sealed Ta at ∼450 °C. Its orthorhombic framework structure (space group C2221, 6.309(3) × 10.986(4) × 6.162(4) Å) contains one-dimensional helical pores ∼6 Å in diameter along c⃗ (6 atoms/turn) that bind relatively well-ordered sodium countercations at 50% occupancy. The structure can also be described in terms of interlinked puckered double layers normal to b⃗ and parallel to the channels. Gallium is disordered over bo… Show more

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Cited by 36 publications
(46 citation statements)
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“…[115] A different proportion of elements from the two groups and another expression of cation accommodation in a four-bonded helical net occurs in Na(GaSn 2 ) which is more clearly described as Figure 12. [116] A very similar result with a different space group is found for NaInSn 2 .…”
Section: Tetrelide Networksupporting
confidence: 70%
“…[115] A different proportion of elements from the two groups and another expression of cation accommodation in a four-bonded helical net occurs in Na(GaSn 2 ) which is more clearly described as Figure 12. [116] A very similar result with a different space group is found for NaInSn 2 .…”
Section: Tetrelide Networksupporting
confidence: 70%
“…In addition, the framework is missing the Ga6 waist atoms of the present (Ga,Ag) 18 "drum", giving instead a simple hexagonal prism with each Ga5-type atom again exo-bonded to an icosahedron. 2002, 628, 2715Ϫ2723 2721 (x ϭ ϳ0.5) [22] with tin mixing on some of the gallium sites. Allg.…”
Section: Related Phasesmentioning
confidence: 99%
“…[115] Andere Verhältnisse der beiden Elementgruppen und eine andere Möglichkeit der Kationenanordnung in einem vierfach gebundenen helicalen Netzwerk zeigen sich bei Na(GaSn 2 ), das besser als 3 I [4b-Ga À (4b-Sn 0 ) 2 ] beschrieben werden sollte (Abbildung 12). [116] Eine sehr ähnliche Struktur, allerdings mit anderer Raumgruppe, wurde bei NaInSn 2 gefunden. [117] )] deutlich, wobei alle Zinnatome der Oktettregel folgen.…”
Section: Netzwerkverbindungen Als Zintl-phasenunclassified