[Zr0.72Y0.28]Al4C4: A new member of the homologous series (MC)l(T4C3)m (M=Zr, Y and Hf, T=Al, Si and Ge)
[Zr0.72Y0.28]Al4C4: A new member of the homologous series (MC)l(T4C3)m (M=Zr, Y and Hf, T=Al, Si and Ge)
复制标题
DOI：
10.1016/j.jssc.2009.04.007
复制
发表时间：
2009-07
影响因子：
3.3
通讯作者：
Keita Sugiura;T. Iwata;H. Nakano;K. Fukuda
中科院分区：
文献类型：
--
作者：
Keita Sugiura;T. Iwata;H. Nakano;K. Fukuda
合成了一种新型层状碳化物[Zr{sub 0.72(3)}Y{sub 0.28(3)}]Al{sub 4}C{sub 4}，并通过X射线粉末衍射、透射电子显微镜和能量色散X射线光谱(EDX)对其进行了表征。通过EDX测定原子比[Zr:Y]，通过直接法推导初始结构模型，并通过Rietveld方法进一步精修。该晶体为三角晶体（空间群 P3-barm1，Z=1），晶格尺寸为 a=0.333990(5) nm、c=1.09942(1) nm 和 V=0.106209(2) nm{sup 3}。该化合物显示出由 Al{sub 4}C{sub 3} 型 [Al{sub 4}C{sub 4}] 层分隔的 [Zr{sub 0.72}Y{sub 0.28}C{sub 2}] 薄板的共生结构。它是同系中l=1、m=1的新成员，通式为(MC){sub l}(T{sub 4}C{sub 3}){sub m}（l=1、2和3，m=1和2，M=Zr、Y和Hf，T=Al、Si和Ge）。 - 图解摘要：合成了层状碳化物 (Zr{sub 0.72}Y{sub 0.28}C)Al{sub 4}C{sub 3}，它是同系系列 (MC){sub l}(T{sub 4}C{sub 3}){sub m} (l=1, 2 和 3，m=1 和 2，M=Zr，Y 和Hf、T=Al、Si 和 Ge）。
A new layered carbide, [Zr{sub 0.72(3)}Y{sub 0.28(3)}]Al{sub 4}C{sub 4}, has been synthesized and characterized by X-ray powder diffraction, transmission electron microscopy and energy dispersive X-ray spectroscopy (EDX). The atom ratios [Zr:Y] were determined by EDX, and the initial structure model was derived by the direct methods, and further refined by Rietveld method. The crystal is trigonal (space group P3-barm1, Z=1) with lattice dimensions of a=0.333990(5) nm, c=1.09942(1) nm and V=0.106209(2) nm{sup 3}. This compound shows an intergrowth structure with [Zr{sub 0.72}Y{sub 0.28}C{sub 2}] thin slabs separated by Al{sub 4}C{sub 3}-type [Al{sub 4}C{sub 4}] layers. It is a new member with l=1 and m=1 of the homologous series, the general formula of which is (MC){sub l}(T{sub 4}C{sub 3}){sub m} (l=1, 2 and 3, m=1 and 2, M=Zr, Y and Hf, T=Al, Si and Ge). - Graphical Abstract: The layered carbide (Zr{sub 0.72}Y{sub 0.28}C)Al{sub 4}C{sub 3} has been synthesized and found to be a new member with l=1 and m=1 of the homologous series (MC){sub l}(T{sub 4}C{sub 3}){sub m} (l=1, 2 and 3, m=1 and 2, M=Zr, Y and Hf, T=Al, Si and Ge).