Redetermination of the double salt Λ‐[tris­(ethyl­enediamine)­cobalt(III) trichloride]–sodium chloride–water (2/1/6)

The structure of the title compound, {[Co(C₂H₈N₂)₃]Cl₃}₂·‐[Na(H₂O)₆]Cl, has been redetermined to a higher degree of accuracy. The true space group is shown to be trigonal P3, but the structure is extremely close to hexagonal P6₃. Both of the independent Λ‐[Co(en)₃]Cl₃ moieties (en is ethyl­enedi­amine) and the [Na(H₂O)₆]Cl unit reside on sites of crystallographic threefold symmetry. The sodium and chloride ions share the same lattice positions and the whole [Na(H₂O)₆]Cl unit is disordered over two positions in an approximate ratio of 0.73:0.27.