Potassium Dimolybdate, K₂Mo₂O₇

Potassium Dimolybdate, K₂Mo₂O₇, is formed by fusion of suitable quantities of K₂CO₃ and MoO₃, but is unstable; the aqueous extract of the fused mass yields large crystals which immediately begin to decompose.

The salt melts at 484° C., apparently without transformation.