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Thermal Expansion of Synthetic β‐Spodumene and β‐Spodumene—Silica Solid Solutions
Author(s) -
OSTERTAG W.,
FISCHER G. R.,
WILLIAMS J. P.
Publication year - 1968
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.1151-2916.1968.tb12638.x
Subject(s) - spodumene , thermal expansion , cristobalite , materials science , volume expansion , anisotropy , solid solution , mineralogy , tridymite , diffraction , crystallography , chemistry , composite material , metallurgy , optics , quartz , ceramic , medicine , physics
Synthetic β‐Spodumene and several β‐Spodumene‐silica solid solutions were prepared, and their thermal expansion behavior was studied using high‐temperature X‐ray diffraction techniques. Data indicate that all β‐Spodumenes are characterized by a pronounced anisotropy of thermal expansion much the same as that of the silica polymorph keatite. Anisotropy increases slightly and the volume expansion decreases as the compositions become richer in SiO 2 . Specimens with more than 80.8 wt% SiO 2 at 130O°C and 1 atm contain P‐cristobalite along with β‐Spodumene. The lattice parameters of β‐Spodumene compositions throughout the solid solution range were determined. The structural aspects of the anisotropy of thermal expansion are discussed.