Japanese Journal of Applied Physics · 1987 · 49 citations · 1 references
Natural SciencesChemistryPhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsCrystal ChemistryCrystal LatticeCrystal SystemsMagnetism In SolidsPhase TransitionsSuperconducting MaterialsCuprate SuperconductorsHigh-temperature SuperconductivityHigh-temperature SuperconductorsLattice ParametersReactivitySuperconducting Properties
Crystals with a stoichiometry either Ba 2 YCu 3- x O 7- y or Ba 4 YCu 2 O 8- y are a high t c superconductor. The former is well known. With respect to the latter the crystal structure was determined to be tetragonal with lattice parameters a =5.78 Å and c =7.99 Å. It was found that both of them reacted with water. The former was slowly decomposed by warmed water at about 35°C, while the latter was destroyed at room temperature in an instant.
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