Na, Rb and T1 distributions between phlogopite and sanidine by direct synthesis in a common vapour phase

Details Na, Rb and T1 distributions between phlogopite and sanidine by direct synthesis in a common vapour phase Na, Rb and T1 distributions between phlogopite and sanidine by direct synthesis in a common vapour phase

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42..703f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 42, Issue 6, pp.703-708

Physics

Scientific paper

Using a double-capsule technique, phlogopite and sanidine were equilibrated directly in a common aqueous vapour phase to study the distributions of Na, Rb and T1 at 700°C and 1.5 Kbar. Behaviour of these elements approaches ideality for wt.% concentrations of up to Na = 0.18, Rb = 0.55 and T1 = 0.065 in phlogopite and 0.19, 0.33 and 0.063 respectively in sanidine. The following partition coefficients and K D values for phlogopite/sanidine were obtained: D (Na) = 0.83, D (Rb) = 2.3 rmand D (T1) = 1.3; K D (Na/K) = 1.2, K D (Rb/K) = 3.2 and K D (T1/K) = 1.8. Although these results are preliminary and in some cases marred by analytical uncertainty, they nevertheless demonstrate the feasibility of the technique as applied to studies of multielement distribution between two or more coexisting solid phases.

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