Inorganic Chemistry
Inorganic Chemistry
3 years ago

Highly Symmetric AB2 Framework Related to Tridymite in the Disordered Nitridosilicate La24Sr14–7x[Si36N72](O1–xFx)14 (x = 0.489)

Highly Symmetric AB2 Framework Related to Tridymite in the Disordered Nitridosilicate La24Sr14–7x[Si36N72](O1–xFx)14 (x = 0.489)
Dajana Durach, Felix Fahrnbauer, Gavin B. M. Vaughan, Lukas Neudert, Oliver Oeckler, Wolfgang Schnick
High-temperature metathesis starting from silicon and imides, hydrides, and fluorides accesses highly condensed nitridosilicates. Using this approach, La24Sr14−7x[Si36N72](O1−xFx)14 (x ≈ 0.489) was obtained and the structure determination of the needle-shaped microcrystals was done by microfocused synchrotron X-ray diffraction. Transmission electron microscopy confirmed the structure model that is the first representative of a predicted AB2 framework related to tridymite. The highly symmetric structure exhibits channels filled with La3+, Sr2+, O2−, and F− expecting possible ion exchanges and substitution experiments.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01862

DOI: 10.1021/acs.inorgchem.7b01862

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