Na12 (Mn Nb12 O38) (H2 O)50

MnNb₁₂O₈₆

Flynn, C.M.Stucky, G.D.

Inorganic Chemistry (1969) 8, 335-344

a=24.18Å   b=12.69Å   c=14.14Å

α=90°   β=92.1°   γ=90°