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The System Silica‐Sodium Tetraborate
Author(s) -
ROCKETT T. J.,
FOSTER W. R.
Publication year - 1966
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.1151-2916.1966.tb13143.x
Subject(s) - tridymite , cristobalite , liquidus , metastability , crystallization , flattening , sodium , quartz , mineralogy , materials science , orthoclase , phase (matter) , crystallography , thermodynamics , chemistry , feldspar , metallurgy , composite material , physics , organic chemistry
The phase relations were established for the system silica‐sodium tetraborate. The silica liquidus curve exhibits strong upward concavity but shows no flattening. The tridymite‐cristobalite transformation occurred at 1410°± 10°C. A lowering of the α to β quartz inversion temperature of about 9°C was detected. Primary crystal habits are discussed. The region of metastable subliquidus immiscibility is also discussed and the nature of initial crystallization of the silica‐rich liquid is shown.