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Synthesis and Characterization of a Novel Misfit-layered Copper Manganese Hydroxide Oxide

A copper manganese hydroxide oxide, CuMn 2.22 O 5.25 · 2.04H 2 O, which has a novel misfit-layered structure built with pseudohexagonal MnO 2 and orthorhombic Cu(OH) 2 sheets, has been hydrothermally synthesized by using the layered birnessite as the precursor. This compound has been investigated by XRD, SEM, TEM, SAED, and TG-DTA. In this compound, manganese oxide sublattice is hexagonal with a 1 = 0.282 and c 1 = 0.942 nm, and copper hydroxide sublattice is orthorhombic and has a C-center with a 2 = 0.578, b 2 = 0.276, and c 2 = 0.942 nm. The two sublattices in this compound have different symmetry, and they are incommensurate along a direction in ab plane.