Pressure-induced octahedral rotation in RbMn〔Fe(CN)6〕

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  • Pressure-Induced Octahedral Rotation in RbMn[Fe(CN)<SUB>6</SUB>]
  • Pressure induced octahedral rotation in RbMn Fe CN 6

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Hydrostatic pressure effect on Prussian blue type network in RbMn[Fe(CN)6] has been investigated by high-pressure vibrational spectroscopy. Frequencies of the CN stretching modes increase as pressure increases: dhω⁄dP=6.4 cm−1/GPa for A1g mode and 4.3 cm−1/GPa for Eg mode. With further increase of pressure beyond ≈2 GPa, slope of the hω–P curve becomes fairly gradual. We ascribed the behavior to the in-plane rotation of FeC6/MnN6 octahedra, since it compensates the pressure-induced contraction in volume.

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