Quaternary Lead–Niobium–Tungsten Oxides Based on the Tetragonal Tungsten Bronze Structure

The Superstructure of Lead Tetragonal Tungsten Bronze

“…4a) suggested that the center spot of the triplet of superstructure reflections on odd-order layers coincides with the corners of the basic ffiffi ffi 2 p a n TTB cell repeat of TTB observable on even-order layers. This was supported by the analysis of asymmetric SAED patterns using a method devised to interpret reciprocal lattice periodicities in adjacent Laue levels of asymmetric SAED patterns (15,27). Examples of this analysis are shown in Figs.…”

“…The formation of these supercells has been linked to WO 6 octahedral framework distortion, and for tin-and lead-TTB, a possible ordering amongst guest metal tunnel occupants. Superlattices are also common in fully oxidized ternary oxides which are also based on the TTB structure, such as Nb 8 W 9 O 47 (12) and Nb 4 W 7 O 31 (13,14), and the origin of these has been explored in a related study (15).…”

Processing–Property Relations in Grain‐Oriented Lead Metaniobate Ceramics Fabricated by Layered Manufacturing

“… Schematic representation of the A, B, and C sites in the (001) projection of tetragonal tungsten bronze structure 5 …”

Proton and Deuteron Exchange in TTB‐Like Na1.2Nb1.2W0.8O6: Structural Characterization and Spectroscopic Study

“…[20] Commensurate modulations are frequently observed in TTB-related structures due to octahedra tilt and/or cation order in the tunnels. [21][22][23] Initial attempts to describe the modulated TTB structure of the exchanged product observed by ED were made on the basis of orthorhombic supercells similar to those reported by Lin et al [24,25] A systematic study of the reciprocal lattice was carried out for a series of SAED patterns in different zone axes, which are depicted in Figure 4. The SAED patterns always show the presence of modulation satellites, which were indexed on the basis of an orthorhombic supercell with a ≈ 2√2a TTB , b ≈ √2a TTB , and c = 2c TTB .…”