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

作者：Bailey Andrew S; Hughes Robert W; Hubberstey Peter; Ritter Clemens; Smith Ronald I; Gregory Duncan H^*

来源：Inorganic Chemistry, 2011, 50(19): 9545-9553.

DOI：10.1021/ic201264u

New ternary and quaternary nitride halides, Ba(2)N(X,X') (X = F, Cl, Br; X' = 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' = Cl, Br, I) crystallize in the hexagonal space group R$(3)over bar $m, with the anti-alpha-NaFeO(2) structure. Ba(2)NF forms with both an anti-alpha-NaFeO(2) structure, in which N(3-) and F(-) are ordered and an anion-disordered simple rock salt structure. The hexagonal polymorph of Ba(2)NF 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.

• 出版日期2011-10-3