Un Monophosphate Synth6tique de Sodium et de Cobalt: Na4Co7(PO4)6

Tetrasodium heptacobalt hexaphosphate, a new monophosphate prepared by hydrothermal methods, comprises CoO6 and CoO4 coordination polyhedra connected to each other by corner and edge sharing to form zigzag layers parallel to the ab plane. These layers are interconnected by Co0 polyhedra and P-O tetrahedra via corner sharing to form a three-dimensional network. The Na + ions are located in the tunnels running parallel to the a axis. This compound is isostructural with