Figure 4
Crystal structure drawing of (a) RbGa(HAsO4)2 and (b) RbGa2As(HAsO4)6 equal layers, viewed along the a axis. In these topologically equivalent layers, there are no visible differences between the two structure types apart from very minor changes in the hydrogen-bond geometries. The Rb atoms in both compounds show a slight positional disorder and are 12-coordinated. |