Solid solutions in the Ba₂Y_1−xCu_xWO_6−y system

Structure and dielectric properties of $$\hbox {Ba}_{2}\hbox {Cu}_{x}\hbox {Y}_{1-x} \hbox {TaO}_{6-y}$$ double perovskite

“…Since BYT appears as a secondary phase in Ta-doped Y123 [1], it suggests to one that Copper should have some solubility in the BYT complex perovskite, such as the Ba 2 Y 1−x Cu x WO 6−y system already reported [25]. This paper presents the first investigation of the physical properties of Ba 2 Y 1−x Cu x TaO 6−y system for 0.00 ≤ x ≤ 0.50.…”

Structure of the M2CuWO6 System, with M = Ba or Sr

“…The structure was solved by extrapolation of the cubic ordered perovskite observed in the Ba 2 Y]. x Cu x WO 6 system (Garcia-Ruiz, Bokhimi and Portilla, 1992). Atomic scattering factors for neutral atoms from the International Tables for X-ray Crystallography (1974) were used.…”

“…1 2 0 2 0 0 4 2 2 0 1 1 4 2 1 3 3 0 1 2 2 2 3 1 0 2 0 4 1 0 5 3 1 2 3 0 3 3 2 1 2 2 4 0 0 6 2 1 5 4 0 0 h k I 1 0 1 0 0 2 2 0 0 1 0 3 2 1 1 2 0 2 0 0 4 2 2 0 1 1 4 2 1 3 3 0 1 2 2 2 3 1 0 2 0 4 1 0 5 3 1 2 3 0 3 3 2 1 2 2 4 0 0 6 2 1 5 4 0 0 3 1 4 3 2 3 1 1 6 In the Ba 2 CuWO 6 phase, partial substitution of copper by yttrium gives rise to a cubic structure. This happens for Y:Cu molar relations larger than 0.33 (Garcfa-Ruiz, Bokhimi and Portilla, 1992).…”

“…Further work has shown that in this compound yttrium can be substituted by copper, described by the formula Ba8Y 3 _ x Cui +x W 4 O 24 . At x > 2.0 the cubic structure is no longer stable, and the tetragonal phase Ba 2 CuWO 6 appears (Garcia-Ruiz, Bokhimi and Portilla, 1992). This phase is known (Blasse, 1965) and has been reported to have a tetragonal unit cell (Kapyshev, Ivanova and Venevtsev, 1966).…”

Structure and dielectric properties of Ba$_2$Cu$_x$Y$_{1-x}$TaO$_{6-y}$ double perovskite

“…Since as BYT appears as a secondary phase in Ta-doped Y123 [1], it suggests to one that Copper should have some solubility in the BYT complex perovskite, such as the Ba 2 Y 1−x Cu x WO 6−y system already reported [25]. This paper presents the first investigation of the physical properties of Ba 2 Y 1−x Cu x TaO 6−y system for 0.00 ≤ x ≤ 0.50.…”