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Gamperl L, Neudert L, Schultz P, Durach D, Schnick W, Oeckler O. Structure Elucidation of Complex Endotaxially Intergrown Lanthanum Barium Oxonitridosilicate Oxides by Combination of Microfocused Synchrotron Radiation and Transmission Electron Microscopy. Chemistry 2021; 27:12835-12844. [PMID: 34240752 PMCID: PMC8518372 DOI: 10.1002/chem.202101665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Indexed: 12/03/2022]
Abstract
Single‐crystalline domains in intergrown microcrystalline material of the new compounds Ba22.5+xLa55−x[Si129N240−xOx]O3:Ce3+ and Ba25.5+xLa77−x[Si170N312−xO9+x]O4:Ce3+ were identified by transmission electron microscopy (TEM). Precise diffraction data from these domains were collected with microfocused synchrotron radiation so that crystal structure elucidation of the complex disordered networks became possible. They are composed of two different interconnected slabs of which one is similar in both compounds, which explains their notorious intergrowth. The distribution of Ba and La is indicated by the analysis of bond‐valence sums and by comparison with isostructural Sr28.5+xLa75−x[Si170N312−xO9+x]O4. Ce3+ doping leads to yellow luminescence. This is a showcase that highlights the discovery and accurate characterization of new compounds relevant for luminescence applications from heterogeneous microcrystalline samples by exploiting the capability of the combination of TEM and diffraction using the latest focusing techniques for synchrotron radiation.
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Affiliation(s)
- Lisa Gamperl
- Department of Chemistry, University of Munich (LMU), Butenandtstr. 5-13, 81377, Munich, Germany
| | - Lukas Neudert
- Department of Chemistry, University of Munich (LMU), Butenandtstr. 5-13, 81377, Munich, Germany.,Institute for Mineralogy, Crystallography and Material Science, Leipzig University, Scharnhorststr. 20, 04275, Leipzig, Germany
| | - Peter Schultz
- Institute for Mineralogy, Crystallography and Material Science, Leipzig University, Scharnhorststr. 20, 04275, Leipzig, Germany
| | - Dajana Durach
- Department of Chemistry, University of Munich (LMU), Butenandtstr. 5-13, 81377, Munich, Germany
| | - Wolfgang Schnick
- Department of Chemistry, University of Munich (LMU), Butenandtstr. 5-13, 81377, Munich, Germany
| | - Oliver Oeckler
- Institute for Mineralogy, Crystallography and Material Science, Leipzig University, Scharnhorststr. 20, 04275, Leipzig, Germany
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Kawahara T, Murata T, Tokuhara Y, Tezuka K, Shan YJ. Preparation of new apatite-type oxynitrides Pr Si3O(3−3+12)/2N (x = 4.4 to 4.8 and y = 0.8 to 1.1) in sealed silica tubes. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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