Powder neutron diffraction is used to solve the structures of the n=2 and n=∞ members of the Ruddlesden-Popper series, Sr(n+1)Sn(n)O(3n+1). It is confirmed that SrSnO3 adopts the GdFeO3 structure space group Pbnm. It is found that Sr3Sn2O7 adopts a C-centered orthorhombic structure (space group Cmcm). A comparison is made between the cooperative tilting of the SnO6 octahedra as a function of the number of adjoining Sn-O planes. It is shown that the inclusion of the rock salt layer within the structure greatly relieves the internal strain caused by the mismatch between the SnO2 and Sr2O2 layers. (C) 2000 Elsevier Science Ltd.
ASJC Scopus subject areas
- Materials Chemistry