Open AccessBa 2 Gd 2 (Si 4 O 13 ): a silicate with finite Si 4 O 13 chains
Author(s) -
WierzbickaWieczorek Maria,
Kolitsch Uwe,
Tillmanns Ekkehart
Publication year - 2010
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
eISSN - 1600-5759
pISSN - 0108-2701
DOI - 10.1107/s0108270110002842
Subject(s) - crystallography , silicate , zigzag , polyhedron , molybdate , atom (system on chip) , materials science , molybdenum , chemistry , inorganic chemistry , geometry , mathematics , computer science , embedded system , organic chemistry
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.