Figure 5
(a) Occupied 16(l) sites (Zr4 tetrahedra, grey) in Zr2NiD4.5. Four unit cells are outlined. Zr: dark-grey spheres; Ni: light-grey spheres. (b) The two types of filling of the chains of alternating face- and corner-sharing 16(l) tetrahedra. Some empty 16(l) tetrahedra are outlined (black lines) to elucidate the chains of alternating face- and corner-sharing 16(l) tetrahedra in the [01] direction. |