Crystal structure of a new selenite-sulfate compound Ag4Cu(SeO3)2(SO4).

A new selenite-sulfate compound Ag4Cu(SeO3)2(SO4) was successfully obtained through a conventional hydrothermal method. Single-crystal X-ray diffraction data analysis indicates clearly that the compound crystallizes in the orthorhombic system of the space group Pca21. Unit-cell parameters are a = 11.7371 (2) Å, b = 8.0846 (2) Å, c = 10.2759 (2) Å. The compound exhibits a layered structure, which is formed by the arrangement of 1D chains extending along the c axis.