An atypical coordination in hexacyanometallates: Structure and properties of hexagonal zinc phases

Synthesis and characterization of magnetic hexacyanoferrate (II) polymeric nanocomposite for separation of cesium from radioactive waste solutions

“…These structures are zeolitic rhombohedral which has cavities that can host alkali metal ions and water molecules, cubic (Fm-3m) and hexagonal (R-3c), related to Zn atom in octahedral and tetrahedral coordinations, respectively [15,36]. Based on the data revealed from both FTIR and XRD analysis, the zeolitic rhombohedral, K 2 Zn 3 [Fe(CN) 6 ] 2 ÁxH 2 O, is the structure mainly proposed for the prepared zinc hexacyanoferrates under the applied experimental conditions.…”

“…Some zinc hexacyanoferrates have been reported as hexagonal where Zn 2+ atom is found tetrahedrally coordinated to four N atoms from CN ligands. Such coordination provides a relatively high thermal stability to these materials and also an interesting porous framework because both metal centers have saturated their coordination sphere with atoms from the bridge group (-CRN-) [15]. Hexacyanoferrates obtained by chemical precipitation are physically fragile and require a solid support when used in columns.…”

A thermogravimetric study of thermal dehydration of copper hexacyanoferrate by means of model-free kinetic analysis

“…The currently accepted structure model for alkali-free PB was presented in the 1970s by Buser et al [7], derived from single-crystal X-ray diffraction data. Most PBA structures are isotypic with that of PB and crystallize in the cubic space group Fm 3m, albeit structures with lower symmetries do exist [15,16].…”

Tetrahedral coordination for Zn in hexacyanometallates: Structures of Zn3A2[M(CN)6]2·xH2O with A=K, Rb, Cs and M=Ru, Os

“…The 3D structure of hexacyanometallates is formed by the assembling of the octahedral anionic building unit, [M n (CN) 6 ] nÀ6 , through a second transition metal linked at the N ends. Usually that second metal (T) has also octahedral coordination and a solid with a cubic unit cell is obtained.…”