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Reactions Between Alkaline‐Earth Sulfates and Cirstobalite
Author(s) -
BROWNELL W. E.
Publication year - 1963
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.1151-2916.1963.tb11694.x
Subject(s) - alkaline earth metal , chemistry , inorganic chemistry , cristobalite , decomposition , sulfate , strontium , thermal decomposition , barium , sulfur , magnesium , barium sulfate , mineralogy , alkali metal , materials science , organic chemistry , metallurgy , quartz
The decomposition of magnesium and calcium sulfates was measured preliminary to measuring the reactions between alkaline‐earth sulfates and cristobalite. Since gaseous sulfur oxides were evolved in the processes, a starch‐iodide titration was used to determine the amounts of decomposition and reaction with time. Magnesium sulfate decomposed at temperatures above 900°C, before reaction with cristobalite. Calcium sulfate was found to react with cristobalite previous to thermal decomposition with an accompanying evolution of sulfur dioxide. Strontium and barium sulfates reacted with cristobalite at progressively higher temperatures. The applications of the data to the sulfur problems in the production of clay products are discussed.