Octa-kis(di-butyl-ammonium) deca-molybdate(VI).

In the title salt, (C8H20N)8[Mo10O34], the [Mo10O34]8- polyanion is located about an inversion centre and can be considered as a ß-type octa-molybdate anion to which two additional MoO4 tetra-hedra are linked via common corners. The [Mo10O34]8- polyanions are packed in rows extending parallel to [001] and are connected to the di-butyl-ammonium counter-cations through N-H⋯O hydrogen-bonding inter-actions.