Structural characterization of lead (II) oxybromide Pb3O2Br2

The lead (II) oxybromide Pb3O2Br2 has been prepared by solid state reaction between PbO and PbBr2 and its structure has been characterized by means of X-ray powder diffraction. The compound is crystallized in the orthorhombic system in space group Pnma, the lattice constance are: a = 12.252(3), b = 5.873(1), c = 9.815(3) إ. The structure of Pb3O2Br2 is built up of the distorted edgeshared [Pb4O] tetrahedra forming the doubled infinite chains parallel to [010]. These chains are mutually connected by Br atoms. A comparison with other Pb3O2X2 (X = Cl, I) substances is presented.