Orthorhombic–orthorhombic phase transitions in Nd2NiO4+δ (0.067≤δ≤0.224) |
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Authors: | Kenji Ishikawa Kenji Metoki Hiroshi Miyamoto |
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Affiliation: | aDepartment of Applied Chemistry, Meiji University, Higashi-mita, Tama-ku, Kawasaki 214-8571, Japan |
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Abstract: | Variation of the phases of Nd2NiO4+δ with the excess oxygen concentration δ has been examined at room temperature in the range 0.067≤δ≤0.224 using the X-ray powder diffraction technique. The phases observed at room temperature are orthorhombic-I (0.21<δ≤0.224), orthorhombic-IV (0.175<δ≤0.21), orthorhombic-II (0.15<δ≤0.175), orthorhombic-II+quasi-tetragonal-I (0.10<δ≤0.15), and quasi-tetragonal-I (0.067<δ≤0.10). |
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Keywords: | Nd2NiO4+δ Phase transforms Phase diagram |
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