New Ternary and Quaternary Barium Nitride Halides; Synthesis and Crystal Chemistry

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• 作者：Andrew S. Bailey ; Robert W. Hughes ; Peter Hubberstey ; Clemens Ritter ; Ronald I. Smith ; Duncan H. Gregory
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：October 3, 2011
• 年：2011
• 卷：50
• 期：19
• 页码：9545-9553
• 全文大小：946K
• 年卷期：v.50,no.19(October 3, 2011)
• ISSN：1520-510X

文摘

New ternary and quaternary nitride halides, Ba₂N(X,X鈥? (X = F, Cl, Br; X鈥?= Br, I), have been synthesized from the high temperature reactions of barium subnitride with the respective barium halides under an inert atmosphere. The former include the first fully characterized barium nitride halides for X other than F, and the latter are the first examples of barium nitride mixed halides. The variation in structure with composition has been investigated by powder X-ray and powder neutron diffraction techniques. The heavier ternary and quaternary nitride halides (X, X鈥?= Cl, Br, I) crystallize in the hexagonal space group R3̅m, with the anti-伪-NaFeO₂ structure. Ba₂NF forms with both an anti-伪-NaFeO₂ structure, in which N^{3鈥?/sup> and F鈥?/sup> are ordered and an anion-disordered simple rock salt structure. The hexagonal polymorph of Ba₂NF is the only example to date of a nitride fluoride adopting this layered structure. Both the ternary and the quaternary compounds display very weak, temperature independent paramagnetism.}