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Sr(Mg3Ge)N-4 and Sr(Mg2Ga2)N-4: New isostructural Mg-containing quaternary nitrides with nitridometallate anions of (3)(infinity)[Mg3Ge)N-4](2-) and (3)(infinity)[Mg2Ga2)N-4](2-) in a 3D-network structure

Authors
Park, Dong GonDong, YongkwanDiSalvo, Francis J.
Issue Date
Dec-2008
Publisher
ELSEVIER SCIENCE BV
Keywords
Quaternary metal nitrides; Single crystals; X-ray diffraction
Citation
SOLID STATE SCIENCES, v.10, no.12, pp 1846 - 1852
Pages
7
Journal Title
SOLID STATE SCIENCES
Volume
10
Number
12
Start Page
1846
End Page
1852
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/14144
DOI
10.1016/j.solidstatesciences.2008.04.001
ISSN
1293-2558
1873-3085
Abstract
Two new isostructural Mg-containing quaternary nitrides, Sr(Mg3Ge)N-4 and Sr(Mg2Ga2)N-4, were obtained as single crystals from their constituent elements in molten Na. Sr(Mg3Ga2)N-4 and Sr(Mg2Ga2)N-4 both crystallize in space group I4/m (No. 87) with a = 8.316(1), c = 3.398(1) angstrom, Z = 2, and a = 8.2925(7), c = 3.3585(5) angstrom, Z = 2, respectively. The two compounds are isoelectronic, with two Ga3+ in Sr(Mg2Ga2)N-4 replaced by one Mg2+ and one Ge4+ in Sr(Mg3Ge)N-4. Condensed nitridometallate anions, (3)(infinity)[Mg3Ge)N-4](2-) and (3)(infinity)[Mg2Ga2)N-4](2-), form a 3D-network structure with basket-shaped cavities, which are occupied by the Sr2+ counter-catuions. Each Sr2+ coordinates to eight N in a symmetric, near cubic conformation, with all Sr-N bond lengths of 2.86 angstrom. (C) 2008 Elsevier Masson SAS. All rights reserved.
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