X-ray diffraction and Raman spectroscopy studies of BaSrMWO6 (MNi, Co, Mg) double perovskite oxides

B-cation partial substitution of double perovskite La2NiTiO6 by Co2+: Effect on crystal structure, reduction behavior and catalytic activity

“…Perovskite structure can be illustrated by B cations in the center of octahedra sharing corners, whose vertices are occupied by oxygen atoms (BO 6 ), and thus forming a framework that contains the A cations in the center of the cavities between layers of BO 6 octahedra. Double perovskites (DPs) are represented by the formula A 2 B'B''O 6 [3] or A'A''B'B''O 6 [4] and the B-cation sublattice types known for DPs are rock salt, layered and random [4]. In rock salt ordering, B'O 6 and B''O 6 octahedra are ordered like Na and Cl atoms in NaCl structure.…”

“…DPs show interesting physical and chemical properties such as superconductivity, ferroelectricity, antiferroelectricity, piezoelectricity, magnetic properties and optical properties or a combination of both magnetic and electric interactions [5,6]. These materials have been used as electrode in fuel cells [7,8] as well as catalysts [9] and catalyst precursors [10].…”

Studies on the Structure and Optical Properties of BaSrMgWO₆ Thin Films Deposited by A Spin Coating Method

“…Some structural studies performed on BaSrMWO6 (M=Ni, Co, Mg) double perovskite oxides showed that the stable crystalline phase is the cubic one with the space group Fm-3m [16]. Other studies performed on Ba2-xSrxCoWO6 showed that by increasing the Sr content a phase transition from cubic Fm-3m to tetragonal I4/m, and ultimately monoclinic P21/n takes place, being possible that at room temperature to have a mixture of phases [17].…”

“…Until now no study was performed on thin films having the chemical formula BaS-rMWO6 (M=Ni, Co, Mg), all the structural studies being performed on ceramics obtained by solid reaction [16][17][18][19][20][21].…”

X-ray powder diffraction data of LaNi0.5Ti0.45Co0.05O3, LaNi0.45Co0.05Ti0.5O3, and LaNi0.5Ti0.5O3 perovskites

“…The octahedra vertices are occupied by oxygen atoms, while A cations are located at the center of the cavities. Double perovskites (DPs), mostly represented by the formula A ′ A ′′ B ′ B ′′ O 6 , where the number of primes indicate distinct possible metal ions with the same amount (Anderson et al, 1993), present various physical and chemical properties (Anderson et al, 1993;Shaheen and Bashir, 2010;Ezzahi et al, 2011). B-cation sublattice types known for DPs are rock-salt, layered, and random (Anderson et al, 1993).…”