RT Journal Article
SR Electronic
T1 Liquid immiscibility in the system Na <sub>2</sub> O-Al <sub>2</sub> O <sub>3</sub> -SiO <sub>2</sub> -CO <sub>2</sub> at pressures to 1 kilobar
JF American Journal of Science
JO Am J Sci
FD American Journal of Science
SP 234
OP 255
DO 10.2475/ajs.264.3.234
VO 264
IS 3
A1 A. F. Koster van Groos
A1 P. J. Wyllie
YR 1966
UL http://www.ajsonline.org/content/264/3/234.abstract
AB A liquid miscibility occurs within the Quaternary system, Na 2 O-Al 2 O 3 -SiO 2 -CO 2 between Na 2 CO 3 -rich liquids and NaAlSi 3 O 8 -rich liquids. The vapor-saturated liquidus surface does not intersect the miscibility gap at low pressures, but with increasing pressure it undergoes two discontinuous shifts toward the CO 2 apex of the tetrahedron, produced by carbonation reactions in the system Na 2 O-SiO 2 -CO 2 . These position changes cause the vapor-saturated surface to intersect the miscibility gap. At 1 kilobar pressure on the join NaAlSi 3 O 8 -Na 2 CO 3 -CO 2 , the two-liquid field occurs at temperatures above 870 degrees C