摘要
通过单晶X射线衍射的方法确定了成分为Al80.6Cr10.7Fe8.7 的正交相Al4(Cr,Fe)的晶体结构. 该单胞中共有11个晶体学独立原子位置被Cr/Fe占据,其中有10个原子呈二十面体配位. 28个位置由Al原子占据,其中5个原子是二十面体配位. 由于结构中有大量的点位存在这种情况,所以导致二十面体的有效本位数CNeff 12.
The crystal structure of the orthorhombic phase Al4(Cr,Fe) with a composition of Al80.6Cr10.7Fe8.7 has been determined by single crystal X-ray diffraction (Table 2). There are 11 crystallographically independent Cr/Fe sites of which 10 are icosahedrally coordinated. Of the 28 crystallographically independent Al sites 5 are icosahedrally coordinated. However, owing to the presence of many partial occupancies, caused by split atoms, some of these coordinations are only pseudo-icosahedral with effective coordination numbers CNeff 12.
出处
《大连民族学院学报》
CAS
2004年第3期43-45,共3页
Journal of Dalian Nationalities University
