Journal Article

PUBDB-2024-01708

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Crystal structures of two new high-pressure oxynitrides with composition SnGe$_4$N$_4$O$_4$, from single-crystal electron diffraction

Gollé-Leidreiter, P. ; Bhat, S.DESY* ; Wiehl, L.Extern* ; Wen, Q.Extern* ; Kroll, P. ; Ishikawa, R. ; Etter, M.DESY* ; Farla, R.DESY* ; Ikuhara, Y. ; Riedel, R.Extern* ; Kolb, U. (Corresponding author)Extern*

2024
Wiley-Blackwell Oxford [u.a.]

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Please use a persistent id in citations: doi:10.1107/S2052520624002683  doi:10.3204/PUBDB-2024-01708

Abstract: SnGe$_4$N$_4$O$_4$ was synthesized at high pressure (16 and 20 GPa) and high temperature (1200 and 1500°C) in a large-volume press. Powder X-ray diffraction experiments using synchrotron radiation indicate that the derived samples are mixtures of known and unknown phases. However, the powder X-ray diffraction patterns are not sufficient for structural characterization. Transmission electron microscopy studies reveal crystals of several hundreds of nanometres in size with different chemical composition. Among them, crystals of a previously unknown phase with stoichiometry SnGe$_4$N$_4$O$_4$ were detected and investigated using automated diffraction tomography (ADT), a three-dimensional electron diffraction method. Via ADT, the crystal structure could be determined from single nanocrystals in space group P63mc, exhibiting a nolanite-type structure. This was confirmed by density functional theory calculations and atomic resolution scanning transmission electron microscopy images. In one of the syntheses runs a rhombohedral 6R polytype of SnGe$_4$N$_4$O$_4$ could be found together with the nolanite-type SnGe$_4$N$_4$O$_4$. The structure of this polymorph was solved as well using ADT.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P61.2 (PETRA III)
2. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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