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Schultz, Peter; Durach, Dajana; Schnick, Wolfgang; Oeckler, Oliver (2016): Ba1.63La7.39Si11N23Cl0.42:Ce3+ - A Nitridosilicate Chloride with a Zeolite-Like Structure. In: Zeitschrift für Anorganische und Allgemeine Chemie, Vol. 642, No. 8: pp. 603-608
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Abstract

The nitridosilicate chloride Ba1.63La7.39Si11N23Cl0.42:Ce3+ was synthesized by metathesis reaction starting from LaCl3, BaH2, CeF3 and the product of the ammonolysis of Si2Cl6. The title compound is stable towards air and moisture. Diffraction data of a microcrystal were recorded using microfocused synchrotron radiation. X-ray spectroscopy confirms the chemical composition of the crystal. IR spectra corroborate absence of N-H bonds. The compound is homeotypic to Ba2Nd7Si11N23 and crystallizes in space group Cmmm with a = 11.009(3), b = 23.243(8), c = 9.706(4) angstrom and Z = 4, R-1(all) = 0.0174. According to bond valence sum calculations, some crystallographic positions show complete occupancy by Ba or La whereas others contain significant amounts of both elements. In contrast to the structure prototype Ba2Nd7Si11N23, Ba1.63La7.39Si11N23Cl0.42:Ce3+ contains chloride ions in channels of the SiN4 tetrahedra network, hinting at various substitution possibilities of the complex zeolite-like structure.