Synthesis and Structural Characterization of Al_7C_3N_3-Homeotypic Aluminum Silicon Oxycarbonitride, (Al_<7-x>Six)(O_yC_zN_<6-y-z>)(x～1.2, y～1.0 and z～3.5)
Synthesis and Structural Characterization of Al_7C_3N_3-Homeotypic Aluminum Silicon Oxycarbonitride, (Al_<7-x>Six)(O_yC_zN_<6-y-z>)(x～1.2, y～1.0 and z～3.5)
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Al_7C_3N_3-同型铝硅碳氮氧化物(Al_<7-x>Six)(O_yC_zN_<6-y-z>)(x~1.2, y~1.0 and z~3.5)的合成及结构表征
DOI：
10.1016/j.jssc.2011.06.030
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K.Fukuda
中科院分区：
文献类型：
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作者：
D.Urushihara;M.Kaga;T.Asaka;H.Nakano;K.Fukuda
合成了一种新的铝硅氧碳氮化合物（Al5.8Si1.2）（O1.0C3.5N1.5），并用X射线粉末衍射（XRPD）、透射电子显微镜（TEM）、能量色散X射线能谱（EDX）和电子能量损失谱（EELS）等手段对其进行了表征。标题化合物为六方晶系，空间群P63/mmc，晶胞参数a=0.322508（4）nm，c=3.17193（4）nm，V=0.285717（6）nm ~ 3。用EDX和EELS分别测定了Al：Si和O：C：N的原子比。通过直接方法成功地从XRPD数据导出初始结构模型，并通过Rietveld方法进一步细化。该晶体很可能由四种类型的畴组成，它们的比例几乎相同，每一种畴都与空间群为P63 mc的Al_7 C_3 N_3同型。另一种新的碳氮氧化合物（Al 6.6Si 1.4）（O 0.7C4.3N2.0）的存在，它必须是Al_8C_3N_4的同型，也已被XRPD和TEM证实。
A new aluminum silicon oxycarbonitride, (Al5.8Si1.2)(O1.0C3.5N1.5), has been synthesized and characterized by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) and electron energy loss spectroscopy (EELS). The title compound is hexagonal with space group P63/mmc and unit-cell dimensions a=0.322508(4)nm, c=3.17193(4)nm and V=0.285717(6)nm3. The atom ratios of Al:Si and those of O:C:N were, respectively, determined by EDX and EELS. The initial structural model was successfully derived from the XRPD data by the direct methods and further refined by the Rietveld method. The crystal is most probably composed of four types of domains with nearly the same fraction, each of which is isotypic to Al7C3N3with space group P63mc. The existence of another new oxycarbonitride (Al6.6Si1.4)(O0.7C4.3N2.0), which must be homeotypic to Al8C3N4, has been also demonstrated by XRPD and TEM.