Credit: Masahiro Sadakane, Graduate School of Advanced Science and Engineering, Hiroshima University
Preyssler-type phosphotungstate, [P5W30O110M(H2O)]n-, Green octahedra and blue tetrahedra represent W-O6 octahedra and P-O4 tetrahedra, respectively, and grey and black balls represent an encapsulated cation, M, and water oxygen, respectively.