Zur Stabilisierung von Suboxidphasen durch Carbidionen: Die Kristallstruktur von Sr 21 Si 2 O 5 C 6
On the Stabilization of Suboxide Phases by Carbide Ions: The Crystal Structure of Sr 21 Si 2 O 5 C 6 Metallic brass‐coloured crystals of Sr 21 Si 2 O 5 C 6 were isolated from samples starting from the educts Sr : SiO : C = 21 : 2 : 6 heated under argon atmosphere in corundum crucibles up to 1150 K....
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| Veröffentlicht in: | Zeitschrift für anorganische und allgemeine Chemie (1950) 2005-05, Vol.631 (6-7), p.1237-1240 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | On the Stabilization of Suboxide Phases by Carbide Ions: The Crystal Structure of Sr
21
Si
2
O
5
C
6
Metallic brass‐coloured crystals of Sr
21
Si
2
O
5
C
6
were isolated from samples starting from the educts Sr : SiO : C = 21 : 2 : 6 heated under argon atmosphere in corundum crucibles up to 1150 K. The air‐sensitive compound crystallizes in the cubic system, space group
$F d \: \overline{\mathit{3}} \: m, a$
= 1914,56(19) pm, Z = 8. In the crystal structure the Si, O and C atoms are coordinated only by Sr atoms forming distorted icosahedra around Si and distorted octahedra around O and C. The compound can be classified as an electron precise Zintl phase according to (Sr
2+
)
21
(Si
4−
)
2
(O
2−
)
5
(C
4−
)
6
. |
|---|---|
| ISSN: | 0044-2313 1521-3749 |
| DOI: | 10.1002/zaac.200500023 |