Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca_1-xMn_x)CO₃] at 25 °C.

ABSTRACT: A complete series of calcite-rhodochrosite solid solutions [(Ca_1-xMn_x)CO₃] are prepared, and their dissolution processes in various water samples are experimentally investigated. The crystal morphologies of the solid solutions vary from blocky spherical crystal aggregates to smaller spheres with an increasing incorporation of Mn in the solids. Regarding dissolution in N₂-degassed water, air-saturated water and CO₂-saturated water at 25 °C, the aqueous Ca and Mn concentrations reach their highest values after 1240-2400 h, 6-12 h and < 1 h, respectively, and then decrease gradually to a steady state; additionally, the ion activity products (log_IAP) at the final steady state (≈ solubility products in log_K_sp) are estimated to

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC8157444 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature