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Title: Synthesis and structural characterization of a new alkaline earth imide: MgCa(NH)2
Authors: Liu, Y. 
Liu, T. 
Xiong, Z. 
Hu, J. 
Wu, G. 
Chen, P. 
Wee, A.T.S. 
Yang, P. 
Murata, K.
Sakata, K.
Keywords: Amides
EXAFS spectroscopy
Solid-state reactions
Ternary imide
Issue Date: 6-Nov-2006
Citation: Liu, Y., Liu, T., Xiong, Z., Hu, J., Wu, G., Chen, P., Wee, A.T.S., Yang, P., Murata, K., Sakata, K. (2006-11-06). Synthesis and structural characterization of a new alkaline earth imide: MgCa(NH)2. European Journal of Inorganic Chemistry (21) : 4368-4373. ScholarBank@NUS Repository.
Abstract: The ternary imide of MgCa(NH)2 has been successfully synthesized for the first time by the mechanochemical reaction of Mg(NH2) 2 and CaH2 at a molar ratio of 1:1. It was found that ca. four H atoms were desorbed per Mg(NH2)2-CaH2 after 72 h of ball milling leaving a solid residue with the chemical composition of MgCa(NH)2. The solid residue exhibits an imide N-H stretching vibration at 3151 cm-1 and a cubic CaNH-like structure. In addition, X-ray Absorption Fine Structure examination at the Ca K-edge indicates that six N atoms occupy the first coordination shell of the Ca center in an anticipated octahedral geometry, and Ca(Mg) atoms occupy the second coordination shell. The distances of Ca-N and Ca-Ca(Mg) in the newly formed MgCa(NH)2 structure calculated by ESDs are 2.46 and 3.47 Å, respectively. © Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
Source Title: European Journal of Inorganic Chemistry
ISSN: 14341948
DOI: 10.1002/ejic.200600492
Appears in Collections:Staff Publications

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