Single Crystal of a Prussian Blue Analog based on Rubidium Manganese Hexacyanoferrate

A dark brown single crystal of rubidium manganese hexacyanoferrate, Rb0.61Mn[Fe(CN)6]0.87·1.7H2O, was obtained by the slow diffusion method. X‐ray single crystal analysis showed that this compound crystallized in the cubic system of space group Fm 3m with cell constants of a = b = c = 10.5354(4) Å, Z = 4, and R1 = 0.0449. The CN groups bridge octahedral FeC6 and MnN0.87O0.13. Rb and non‐coordinated water (so‐called zeolitic water) exist in the interstitial sites of the cubic lattice.