R2: Crystal structure, crystal chemistry, physical properties of minerals, crystal growth and applied mineralogy

[R2P-04] The reverse effect of vaterite calcitization by Na and K in aqueous solution.

*Noboru Furukawa¹ (1. Chiba Uni. Sci.)

Keywords:vaterite, calcite, sodium, potassium, inhibition

The rate of vaterite calcitization was studied experimentally in K- and Na-bearing aqueous solutions at 4ºC. The vaterite transformation rate was accelerated in the K-bearing solutions but inhibited in the Na-bearing solutions. Sulfur in solutions showed inhibition effects on the vaterite calcitization rate.