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Reactions in the System Li 2 O‐MgO‐Al 2 O 3 ‐SiO 2 : II, Phase Equilibria in the High‐Silica Region
Author(s) -
PROKOPOWICZ T. I.,
HUMMEL F. A.
Publication year - 1956
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1956.tb15832.x
Subject(s) - spodumene , mullite , liquidus , mineralogy , tetrahedron , ceramic , phase (matter) , solid solution , phase boundary , quartz , geology , anorthite , crystallography , materials science , chemistry , metallurgy , organic chemistry
Liquidus and subsolidus relationships were determined for compositions lying on the 65 and 75% SiO 2 planes in the quaternary tetrahedron. From these data and from additional data on several compositions not lying on these two planes, a picture of the probable positions of the phase volumes and quaternary invariant points was formulated. Solid solution effects in quartz and in β‐spodumene, the polymorphism of MgSiO 3 , the phase relationships along the join Li 2 O ‐MgO ° SiO 2 ‐Li 2 O. Al 2 O 3 .2SiO 2 , and the location of the β‐spodumene‐mullite boundary were briefly investigated as subsidiary problems during the course of the work. The significance of the data with respect to ceramic bodies and glazes is discussed.