Abstract
The nitridomagnesogermanate Ca2Mg5GeN6 was synthesized at 780 degrees C using a sodium flux in sealed tantalum ampules. Pure metals were used as starting materials and sodium azide NaN3 was added as nitrogen source. Ca2Mg5GeN6 was obtained as a byproduct in the form of colorless platelet-like crystals. Solution and refinement of the crystal structure [space group P6(3)/mmc (no. 194), Z = 1, a = 3.453(2), c = 17.506(13) angstrom and V = 180.8(2) angstrom(3)] were performed on the basis of single-crystal X-ray diffraction data. Ca2Mg5GeN6 represents the first layered nitridogermanate. Its structure is made up of corner-sharing (Mg/Ge)N-4 tetrahedra and corner-sharing trigonal planar (Mg/Ge)N-3 units with mixed occupancy of Mg and Ge. Ca2+ ions are located in between the sheets. The crystal structure is closely related to that of the nitridomagnesoaluminate CaMg2AlN3 as well as to the carbides ScAl3C3 and UAl3C3.
Item Type: | Journal article |
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Faculties: | Chemistry and Pharmacy > Department of Chemistry |
Subjects: | 500 Science > 540 Chemistry |
ISSN: | 0044-2313 |
Language: | English |
Item ID: | 48377 |
Date Deposited: | 27. Apr 2018, 08:15 |
Last Modified: | 04. Nov 2020, 13:26 |