Wierzbicka-Wieczorek Maria, Kolitsch Uwe, Tillmanns Ekkehart
Universität Wien, Institut für Mineralogie und Kristallographie, Geozentrum, Althanstrasse 14, A-1090 Wien, Austria.
Acta Crystallogr C. 2010 Mar;66(Pt 3):i29-32. doi: 10.1107/S0108270110002842. Epub 2010 Feb 3.
The title compound, dibarium digadolinium(III) tetrasilicate, crystallized from a molybdate-based flux. It represents a new structure type and contains finite zigzag-shaped C(2)-symmetric Si(4)O(13) chains and Gd(2)O(12) dimers built of edge-sharing GdO(7) polyhedra. The [9+1]-coordinated Ba atoms are located in voids in the atomic arrangement. All atoms are in general positions except for one O atom, which lies on a twofold axis. The structure is compared with those of the few other known tetrasilicates.
标题化合物二钡二钆（III）四硅酸盐是从基于钼酸盐的助熔剂中结晶得到的。它代表一种新的结构类型，包含有限的锯齿形C（2）对称Si（4）O（13）链和由边共享GdO（7）多面体构成的Gd（2）O（12）二聚体。[9 + 1]配位的Ba原子位于原子排列的空隙中。除了一个位于二重轴上的O原子外，所有原子都处于一般位置。将该结构与其他几种已知的四硅酸盐结构进行了比较。
