Ba_1.63La_7.39Si₁₁N₂₃Cl_0.42:Ce³⁺ – A Nitridosilicate Chloride with a Zeolite‐Like Structure

Abstract

was synthesized by metathesis reaction starting from LaCl 3 , BaH 2 , CeF 3 and the product of the ammonolysis of Si 2 Cl 6 . The title compound is stable towards air and moisture. Diffraction data of a microcrystal were recorded using microfocused synchrotron radiation. Xray spectroscopy confirms the chemical composition of the crystal. IR spectra corroborate absence of N-H bonds. The compound is homeotypic to Ba 2 Nd 7 Si 11 N 23 and crystallizes in space group Cmmm with a

Synthesis and luminescence properties of new nitridolithosilicate phosphor La4Ba3Li3Si9N19:Pr3+ grown in Li flux

“…The bond length of Ba–N is in the range of 2.343(10)–3.374(5) Å, and the Si–N bond length is between 1.602 (6)–1.818 (4) Å, which is in good agreement with the values reported from other (oxo)nitridosilicates ( e.g. Ba 1.63 La 7.39 Si 11 N 23 Cl 0.42 :1.68(10)–1.77(9) Å, 23 La 3 BaSi 5 N 9 O 2 :1.670(10)–1.773(8) Å). 24 The complete list of interatomic distances and angles can be found in Table S3 (ESI†).…”

LiCa4Si4N8F and LiSr4Si4N8F: Nitridosilicate Fluorides with a BCT‐Zeolite‐Type Network Structure

“…Accordingly, Li EA 4 Si 4 N 8 F ( EA = Ca, Sr) also shows the diverse coordination behavior of EA 2+ ions. The Si–N distances range from 1.68 to 1.76 Å and correspond well with the sum of the ionic radii, as well as with typical distances (e.g., Li 2 Sr 4 Si 4 N 8 O, Si–N: 1.71–1.76 Å and Ba 1.63 La 7.39 Si 11 N 23 Cl 0.42 :Ce 3+ , Si–N: 1.68–1.77 Å). The distances of Ca–N and Sr–N reach from 2.40 to 2.62 Å and 2.59 to 2.98 Å, which is in the typical range.…”

“…This reaction mechanism led, on the one hand, to the first compounds in the system Li‐ EA ‐Si‐N‐F ( EA = Ca, Sr). On the other hand, it enabled the synthesis of new porous nitridosilicates also without any particular precursors [“Si(CN 2 ) 2 “, “Si(NH) 2 ”, or “Si 2 (NH) 3 · 6NH 4 Cl”],, and the formation of a zeolite‐type nitride framework at moderate temperatures. These circumstances underline the versatility of the applied reaction mechanism.…”

Efficient Yellow-Orange Phosphor Lu4Ba2[Si9ON16]O:Eu2+ and Orange-Red Emitting Y4Ba2[Si9ON16]O:Eu2+: Two Oxonitridosilicate Oxides with Outstanding Structural Variety

“…Recently, we reported on several novel (oxo)­nitridosilicates­(chlorides) synthesized by reaction of La X 3 ( X = F, Cl), AE H 2 ( AE = Sr, Ba), and different silicon sources (e.g., “Si­(NH) 2 ”, “Si 2 (NH) 3 ·6 NH 4 Cl”) in a radiofrequency furnace. The formation of highly stable binary salts AEX 2 from La X 3 and AE H 2 is discussed to be the thermodynamic driving force of this reaction type. − Besides an intriguing structural chemistry of the formed silicates, La 3 BaSi 5 N 9 O 2 :Ce 3+ is a promising phosphor for single phosphor luminescence conversion due to its quite broad yellow emission …”