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Sr 2 (OLi 2 Sr 4 )[CrN 4 ] 2 , ein Nitridochromat(VI)‐Oxid mit Sauerstoff in tetragonal‐bipyramidaler Koordination durch Lithium und Strontium
Author(s) -
Hochrein Oliver,
Kniep Rüdiger
Publication year - 2002
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 - 10.1002/1521-3749(200201)628:1<1::aid-zaac1>3.0.co;2-f
Subject(s) - tetragonal crystal system , chemistry , strontium , triclinic crystal system , crystal structure , lithium (medication) , crystallography , nuclear chemistry , medicine , organic chemistry , endocrinology
Sr 2 (OLi 2 Sr 4 )[CrN 4 ] 2 , a Nitridochromate(VI)‐Oxide with Oxygen in Tetragonal‐Bipyramidal Coordination by Lithium and Strontium Green gleaming crystals of Sr 2 (OLi 2 Sr 4 )[CrN 4 ] 2 were prepared by reaction of Li, Sr and CrN/Cr 2 N (approximate 1 : 1 mixture) with flowing nitrogen at 900 °C (molar overall composition Li : Sr : Cr = 6 : 1 : ∼3). The oxygen content results from a leak in the gas supply. The crystal structure was determined by single crystal methods (triclinic; P 1; a = 615.87(9) pm, b = 682.50(10) pm, c = 754.30(8) pm, α = 82.302(14)°, β = 75.197(10)°, γ = 70.133(13)°; Z = 1) and contains distorted tetragonal bipyramids (OLi 2 Sr 4 ) 8+ and [Cr VI N 4 ] 6– ‐tetrahedra besides Sr 2+ .