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Single crystal of BaNdMnO4 with I4/mmm was synthesized by a floating zone method. A new phase of BaNdMnO4 was obtained by annealing the single crystal in a reducing atmosphere at 573 K for 10 d. The structural change was analyzed by four-circle X-ray diffractometry and transmission electron microscopy. The new phase has an orthorhombic unit cell (Fmmm) of a=0.5486(2)nm, b=0.5484(2)nm, and c=1.3059(2)nm.
Single crystal of BaNdMnO4 with I4 / mmm was synthesized by a floating zone method. A new phase of BaNdMnO4 was obtained by annealing the single crystal in a reducing atmosphere at 573 K for 10 d. The structural change was analyzed by four-circle X- ray diffractometry and transmission electron microscopy. The new phase has an orthorhombic unit cell (Fmmm) of a = 0.5486 (2) nm, b = 0.5484 (2) nm, and c = 1.3059 (2) nm.