Demixing of Sodium and Calcium Ions in Montmorillonite Crystallites *
Rachel Levy* and C. W. Francis
Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, U.S.A.
*
Research sponsored by the U.S. Atomic Energy Commission under contract with Union Carbide Corporation.
*
On leave of absence from the Agricultural Research Organization, The Volcani Center, Bet Dagan, Israel. This research was made possible by a fellowship given to the senior author by the IAEA under Contract No. AID/csd 1582.