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Ba<sub>8</sub>CoNb<sub>6</sub>O<sub>24</sub>: A d<sup>0</sup> Dielectric Oxide Host Containing Ordered d<sup><i>7</i></sup> Cation Layers 1.88 nm Apart
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EngineeringSolid-state ChemistryMobile TelecommunicationsSuperconductivityQuantum MaterialsHigh Tc SuperconductorsMaterials ScienceOxide HeterostructuresHigh-tc SuperconductivityPhysicsOxide ElectronicsBarium CationsSemiconductor MaterialCrystallographyCrystal Structure DesignMaterial AnalysisApplied PhysicsCondensed Matter PhysicsNiobium Ions
Following orders: The cobalt and niobium ions in Ba8CoNb6O24 are completely ordered in the seven-layer repeat of hexagonal and cubic stacking. Such site-ordered solids may find application as microwave dielectric resonators, for example, in mobile telecommunications. In the structure shown, {CoO6} and {NbO6} units are red and blue octahedra, respectively, and barium cations are black spheres.
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