Pavlyuk Volodymyr, Dmytriv Grygoriy, Tarasiuk Ivan, Pauly Hermann, Ehrenberg Helmut
Department of Inorganic Chemistry, Ivan Franko Lviv National University, Kyryla i Mefodiya Street 6, 79005 Lviv, Ukraine.
Acta Crystallogr C. 2008 Feb;64(Pt 2):i15-7. doi: 10.1107/S0108270107065985. Epub 2008 Jan 22.
The new ternary lithium copper aluminide Li(8)Cu(12+x)Al(6-x) (x = 1.16) crystallizes in the P6(3)/mmc space group with six independent atom positions of site symmetries 3m. (Al/Cu mixture), 6m2 (Li atoms), 3m. (Al/Cu mixture and Li atoms) and .m. (Cu atoms). The compound is a derivative of the K(7)Cs(6) binary structure type and is related to the binary MgZn(2) Laves phase and the LiCuAl(2), MgCu(1.07)Al(0.93) and Mg(Cu(1-x)Al(x))(2) (x = 0.465) ternary Laves phases. The coordination polyhedra of the atoms in this structure are icosahedra (Cu atoms), slightly distorted icosahedra and bicapped hexagonal antiprisms (Al/Cu statistical mixture), and Frank-Kasper and distorted Frank-Kasper polyhedra (Li atoms). All interatomic distances indicate metallic type bonding.
新型三元锂铜铝化合物Li(8)Cu(12+x)Al(6-x)（x = 1.16）以P6(3)/mmc空间群结晶，具有六个独立的原子位置，其点群对称性分别为3m（铝/铜混合物）、6m2（锂原子）、3m（铝/铜混合物和锂原子）和.m.（铜原子）。该化合物是K(7)Cs(6)二元结构类型的衍生物，与二元MgZn(2)拉维斯相以及LiCuAl(2)、MgCu(1.07)Al(0.93)和Mg(Cu(1-x)Al(x))(2)（x = 0.465）三元拉维斯相有关。该结构中原子的配位多面体为二十面体（铜原子）、轻微扭曲的二十面体和双帽六角反棱柱（铝/铜统计混合物），以及弗兰克 - 卡斯珀和扭曲的弗兰克 - 卡斯珀多面体（锂原子）。所有原子间距离均表明存在金属键型。
