Structural Differences between RbMnCl3 and RbMnBr3

Abstract

The crystal structures of RbMnCl3 and RbMnBr3 were determined to be hexagonal P63/mmc. The differences between these two structures are that in RbMnCiJ there are six close-packed layers while there are two close-packed layers in RbMnBr3. Moreover, in the latter structure the Mn-Br octahedra share opposite faces to form infinite chains of composition (MnBr3) parallel to the c-axis, while in the RbMnCl3 structure such an infinite chain does not exist