Strontium Formate, Sr(HCO₂)₂

Strontium Formate, Sr(HCO₂)₂, is formed in solution by neutralising formic acid with strontium oxide or carbonate. From this solution a dihydrate of density 2.667 crystallises out below about 83° C., and above that temperature the anhydrous salt of density 2.250.

The dihydrate exists in two different rhombic crystalline forms. The freezing-point lowering of water produced by strontium formate has been determined. The molecular refractivity is 49.01.

A double strontium copper formate, 2Sr(HCO₂)₂.Cu(HCO₂)₂.2H₂O, of density 2.133, has been prepared.