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Determination of Local Structural Distortion andJahn-Teller Coupling by Mˆ ssbauer SpectroscopyWhy use 57 Fe as a microprobe to detect the symmetry of the nearestneighborO 2- ions in the MnO 6 octahedron?(1) 57 Fe is Mˆ ssbauer isotope.(2) Fe 3+ ions replace Mn 3+ ions to form Mn(Fe)O 6 octahedron.(3) r3+Mn =r3+Fe =0.645 ≈ in six-fold octahedral coordination.(4) Jahn-Teller effect can be investigated separately.
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