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Title: “114”-Type nitrides LnAl(Si4−xAlx)N7Oδ with unusual [AlN6] octahedral coordination
Authors: Huang, S
Huang, Z
Cao, P
Zujovic, Z
Price, JR
Avdeev, M
Que, M
Suzuki, F
Kido, T
Ouyang, X
Kaji, H
Fang, M
Liu, YG
Gao, W
Söhnel, T
Keywords: Aluminium
Neutron diffraction
X-ray diffraction
Issue Date: 28-Feb-2017
Publisher: Wiley
Citation: Huang, S., Huang, Z., Cao, P., Zujovic, Z., Price, J. R., Avdeev, M., Que, M., Suzuki, F., Kido, T., Ouyang, X., Kaji, H., Fang, M., Liu, Y.-G., Gao, W., & Söhnel, T. (2017). “114”-Type nitrides LnAl(Si4−xAlx)N7Oδ with unusual [AlN6] octahedral coordination. Angewandte Chemie International, 56(14), 4065-4065. doi:10.1002/ange.201612488
Abstract: Aluminum–nitrogen six-fold octahedral coordination, [AlN6], is unusual and has only been seen in the high-pressure rocksalt-type aluminum nitride or some complex compounds. Herein we report novel nitrides LnAl(Si4−xAlx)N7Oδ (Ln=La, Sm), the first inorganic compounds with [AlN6] coordination prepared via non-high-pressure synthesis. Structure refinements of neutron powder diffraction and single-crystal X-ray diffraction data show that these compounds crystallize in the hexagonal Swedenborgite structure type with P63mc symmetry where Ln and Al atoms locate in anticuboctahedral and octahedral interstitials, respectively, between the triangular and Kagomé layers of [SiN4] tetrahedra. Solid-state NMR data of high-purity La-114 powders confirm the unusual [AlN6] coordination. These compounds are the first examples of the “33-114” sub-type in the “114” family. The additional site for over-stoichiometric oxygen in the structure of 114-type compounds was also identified. © 1999-2021 John Wiley & Sons, Inc.
ISSN: 1521-3773
Appears in Collections:Journal Articles

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