Figure 4
Local connectivity of NdO6 polyhedra to (Si2O52−)∞ layers. (a) Connectivity between an Si4O13 unit and an NdO6 octahedron, as found for all Nd atoms in β-K3NdSi6O15 and for the Nd(1) atoms of α-K3NdSi6O15·2H2O. (b) Connectivity between an Si5O16 unit and an NdO6 octahedron, as found for the Nd(2) atoms of α-K3NdSi6O15·2H2O. |