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Ba9Ge3N10: A New Ternary Nitride Containing Isolated Planar Triangular Anions of [GeN3](5-)

Authors
Park, Dong GonDiSalvo, Francis J.
Issue Date
Dec-2008
Publisher
KOREAN CHEMICAL SOC
Keywords
Barium germanium nitrides; Metal nitrides; Nitridometallates
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.29, no.12, pp 2413 - 2418
Pages
6
Journal Title
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Volume
29
Number
12
Start Page
2413
End Page
2418
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/14113
DOI
10.5012/bkcs.2008.29.12.2413
ISSN
0253-2964
1229-5949
Abstract
A new nitride, Ba9Ge3N10, was obtained as single crystals from constituent elements in molten Na. It crystallizes in space group R-3c (No. 167) with a = 7.9399(2) angstrom, c = 17.282(1) angstrom, and Z = 2. It contains the first example of isolated nitridometallate anions of GeN35- in perfect planar triangular shape. Ge-N bond length is 1.786(8) angstrom, which is significantly shorter than any known Ge-N bonds, ranging from 1.84 angstrom to 1.95 angstrom. Valence bond model suggests partial multiple bonding character of the Ge-N bond, which is the first example of such bonding configuration for Ge-N bond. N-centered polyhedral perspective suggests the structure of Ba9Ge3N10 can be conceived as the cationic framework of [Ba9Ge3N9](3+), whose 1/3 of the octahedral interstitial sites are occupied by N3- anions.
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