[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)

作者：Sugiura Keita; Iwata Tomoyuki; Nakano Hiromi; Fukuda Koichiro^*

来源：Journal of Solid State Chemistry, 2009, 182(7): 1619-1623.

DOI：10.1016/j.jssc.2009.04.007

• Layered carbides
• A homologous series
• Powder diffraction
• Rietveld refinement

A new layered carbide, [Zr0.72(3)Y0.28(3)]Al4C4, 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 P (3) over bar m1, Z = 1) with lattice dimensions of a = 0.333990(5) nm, c = 1.09942(1) nm and V = 0.106209(2) nm(3). This compound shows an intergrowth structure with [Zr0.72Y0.28C2] thin slabs separated by Al4C3-type [Al4C4] layers. It is a new member with l = 1 and m = 1 of the homologous series, the general formula of which is (MC)(l)(T4C3)(m) (l = 1, 2 and 3, m = 1 and 2, M = Zr, Y and Hf, T = Al, Si and Ge).

• 出版日期2009-7