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Schlagwörter:
nitridometalates; chromium; crystal structure
Zusammenfassung:
Green gleaming crystals of Sr-2(OLi2Sr4)[CrN4](2) were prepared by reaction of Li, Sr and CrN/Cr2N (approximate 1:1 mixture) with flowing nitrogen at 900degreesC (molar overall composition Li:Sr:Cr=6:1:similar to3). The oxygen content results from a leak in the gas supply. The crystal structure was determined by single crystal methods (triclinic; P(1) over bar; a = 615.87(9) pm, b = 682.50(10) pm, c = 754.30(8) pm, alpha = 82.302(14)degrees, beta = 75.197(10)degrees, gamma = 70.133(13)degrees; Z = 1) and contains distorted tetragonal biyramids (OLi2Sr4)(8+) and [(CrN4)-N-VI](6-)-tetrahedra besides Sr-2+.