Nitridic Analogs of Micas AESi(3)P(4)N(10)(NH)(2) (AE=Mg, Mg0.94Ca0.06, Ca, Sr)

Eisenburger, Lucien; Strobel, Philipp; Schmidt, Peter J.; Bräuniger, Thomas; Wright, Jonathan; Bright, Eleanor Lawrence; Giacobbe, Carlotta; Oeckler, Oliver und Schnick, Wolfgang (2021): Nitridic Analogs of Micas AESi(3)P(4)N(10)(NH)(2) (AE=Mg, Mg0.94Ca0.06, Ca, Sr). In: Angewandte Chemie-International Edition, Bd. 61, Nr. 4

Abstract

We present the first nitridic analogs of micas, namely AESi(3)P(4)N(10)(NH)(2) (AE=Mg, Mg0.94Ca0.06, Ca, Sr), which were synthesized under high-pressure high-temperature conditions at 1400 degrees C and 8 GPa from the refractory nitrides P3N5 and Si3N4, the respective alkaline earth amides, implementing NH4F as a mineralizer. The crystal structure was elucidated by single-crystal diffraction with microfocused synchrotron radiation, energy-dispersive X-ray spectroscopic (EDX) mapping with atomic resolution, powder X-ray diffraction, and solid-state NMR. The structures consist of typical tetrahedra-octahedra-tetrahedra (T-O-T) layers with P occupying T and Si occupying O layers, realizing the rare motif of sixfold coordinated silicon atoms in nitrides. The presence of H, as an imide group forming the SiN4(NH)(2) octahedra, is confirmed by SCXRD, MAS-NMR, and IR spectroscopy. Eu2+-doped samples show tunable narrow-band emission from deep blue to cyan (451-492 nm).

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 1433-7851
• Sprache: Englisch