A powder X-ray diffraction study of a new compound, BaSrGa_4O_8

摘要

A new compound, BaSrGa_4O_8, was synthesized, and the crystal structure was carefully determined. The Rietveld refinement of BaSrGa_4O_8 reveals that GaO_4 tetrahedra form the six-membered rings with sharing corners and the Ba and Sr atoms lie at the large Cavities of the six-membered rings. The structure has space group P6_3 (No. 173) with cell parameters a =9.196(2) A, c=8.6465(15) A. One of the positions of O atoms splits to the O4 and O5 sites.