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Two perovskite rare-earth manganites RMnO 3 (R=Ho, Dy) were synthesized from the hydrothermal redox reactions of KMnO 4 and MnCl 2 at 250°C and characterized by means of X-ray diffraction, scanning electron microscopy and SQUID. They are orthorhombic, whereas the hexagonal phases, which were competitive strongly with the orthorhombic phases in solid-state reactions, are avoided...
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