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http://dx.doi.org/10.5012/bkcs.2005.26.10.1543

Synthesis and Structure of Sr6Ge5N2 and Ba6Ge5N2  

Park, Dong-Gon (Department of Chemistry, Sookmyung Women's University)
Gal, Zoltan A. (Baker Laboratory, Department of Chemistry, Cornell University)
DiSalvo, Francis J. (Baker Laboratory, Department of Chemistry, Cornell University)
Publication Information
Bulletin of the Korean Chemical Society / v.26, no.10, 2005 , pp. 1543-1548 More about this Journal
Abstract
Two isostructural new alkaline earth germanium nitrides, $Sr_6Ge_5N_2\;and\;Ba_6Ge_5N_2$, were obtained as single crystals from constituent elements in molten Na. They both crystallize in space group $P_{mmn}$ (No. 59) with a = 4.0007(8), b = 17.954(3), c = 9.089(2) $\AA$, Z = 2, and a = 4.1620(2), b = 18.841(1), c = 9.6116(5) $\AA$, Z = 2, for $Sr_6Ge_5N_2\;and\;Ba_6Ge_5N_2$, respectively. Their crystal structure contains features for both Zintl and nitride phases: zigzag anionic chain of $_{\infty}Ge^{2-}$, and dumbbell-shaped bent anion of ${GeN_2}^{4-}$. Counter cations of Sr or Ba wrap these anionic units in a channel-like arrangement. Unlike in other germanium nitrides, bond lengths of both Ge-N arms of the ${GeN_2}^{4-}$, are same in $Sr_6Ge_5N_2\;and\;Ba_6Ge_5N_2$.
Keywords
Strontium germanium nitride; Barium germanium nitride; Zintl anion;
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Times Cited By Web Of Science : 9  (Related Records In Web of Science)
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