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Soil Science Society of America Journal Abstract -

Solubility of Calcium Carbonate Precipitated in Montmorillonite Suspensions1


This article in SSSAJ

  1. Vol. 32 No. 5, p. 743-744
    Received: Mar 7, 1968
    Accepted: June 25, 1968

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  1. H. E. Doner and
  2. P. F. Pratt2



Calcium carbonate precipitated in Ca- and Mg-saturated montmorillonite suspensions was more soluble than calcite added to these suspensions. The CaCO3 precipitated from a clay suspended in Ca(OH)2 had a greater solubility than when the CaCO3 was precipitated by the addition of CaCl2 and NaHCO3. The difference in solubility between the two directions of approach to equilibrium was related to the amount of soluble Mg in the system. When CaCO3 was precipitated from CaCl2 and NaHCO3 in clay suspensions with Mg-saturation as a variable, its solubility was related to the amount of Mg in solution with apparently no effect of the clay per se.

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