Zur Stabilisierung von Suboxidphasen durch Carbidionen: Die Kristallstruktur von Sr 21 Si 2 O 5 C 6 | Zendy

Knoth Markus | Zendy; Rößler Ute | Zendy; Eisenmann Brigitte | Zendy

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Zur Stabilisierung von Suboxidphasen durch Carbidionen: Die Kristallstruktur von Sr 21 Si 2 O 5 C 6

Author(s) -

Knoth Markus,

Rößler Ute,

Eisenmann Brigitte

Publication year - 2005

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.200500023

Subject(s) - crystallography , suboxide , corundum , crystal structure , octahedron , materials science , zintl phase , carbide , chemistry , silicon , metallurgy

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 .

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