| Abstract
| - The compound of stoichiometry Mn(II)3[Mn(III)(CN)6]2·zH2O (z = 12−16) (1) forms air-stable,transparent red crystals. Low-temperature single crystal optical spectroscopy and single crystal X-raydiffraction provide compelling evidence for N-bonded high-spin manganese(II), and C-bonded low-spinmanganese(III) ions arranged in a disordered, face-centered cubic lattice analogous to that of PrussianBlue. X-ray and neutron diffraction show structured diffuse scattering indicative of partially correlated (ratherthan random) substitutions of [Mn(III)(CN)6] ions by (H2O)6 clusters. Magnetic susceptibility measurementsand elastic neutron scattering experiments indicate a ferrimagnetic structure below the critical temperatureTc = 35.5 K.
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