Experiments on the simultaneous partitioning of divalent metal ions between talc or chlorite and 2M aqueous chloride solution under supercritical conditions

The simultaneous partitioning of the divalent cations of Ni²⁺, Mg²⁺, Co²⁺, Zn²⁺ , Fe²⁺ Mn²⁺ and Ca²⁺ between talc or chlorite (clinochlore) and 2M aqueous chloride solutions was investigated experimentally in the temperature range of 500 to 700 °C, 1 kbar. The PC-IR curves both for talc and chlorite have a peak near Mg²⁺. Zn²⁺ shows a negative deviation as with other minerals with an octahedral site. Co²⁺ also shows a negative deviation, and the deviation seems to be related to polymerization Of SiO₄ tetrahedra. On the other hand, Ni²⁺ shows a positive deviation, and the deviation seems to decrease with increasing temperature.