The structural mechanisms controlling the anomalous thermal expansion behavior of the cordierite-beryl type structure and other framework silicates are discussed. The expansion of a particular silicate framework depends on the temperature response of the framework itself involving T-0-T and 0-T-0 angular changes, the expansion coefficient(s) of the nontetrahedral bonds, if present, and the interplay between these two factors. For cordierite, beryl, and P -eucryptite, expanding nontetrahedral bonds play a critical role in driving the anomalous thermal expansion observed. For P-spodumene and the feldspars, the thermal response of the framework dominates the expansion mechanism. The effects of channel constituents on the thermal expansion of the cordierite-beryl framework are also discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.