Crystal structure of Na2BaSi2O6

Abstract

The structure of the title compound has been determined by Patterson and Fourier methods from three-dimensional. X-Ray data collected with a scintillation counter, and refined by block-diagonal least squares to R 0·060 for 839 observed independent reflections. Crystals are monoclinic, space group P2₁, with a= 11·440(5), b= 4·758(2), c= 5·670(2)Å, β= 91·42(4)°, Z= 2. The structure contains infinite SiO₃ chains parallel to b linked through five- and six-co-ordinate sodium and eight-co-ordinate barium atoms. It is compared with the related Na₂SiO₃ and BaGeO₃ structures.