1960/08/01 by H. F. W. Taylor · 1 citation
Materials Science · Engineering · Chemistry · #Clay minerals and soil interactions #Glass properties and applications #Concrete and Cement Materials Research #Tobermorite #Anhydrous #Crystallography #Hydrothermal circulation #Crystal structure #Dehydration #Chemistry #Hydrothermal synthesis #Crystal chemistry #Crystal (programming language) #Ion #Materials science #Chemical engineering #Organic chemistry #Metallurgy
paper · doi:10.1002/jctb.5010100802
openalex publication_date 1960/08/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/05/21
Abstract Knowledge of the crystal structures of both anhydrous and hydrated compounds is briefly reviewed, and the problem of relating crystallographic and chemical results is discussed. One approach lies in the study of oriented transformations, i.e., reactions in which the structure of a crystalline starting material is to a considerable extent preserved in that of the product. These include many dehydration reactions, such as those of xonotlite and afwillite, and also some typical hydrothermal processes such as the formation of xonotlite from tobermorite. Studies on oriented transformations at 650‐800° indicate that some reactions in this temperature range proceed through breaking of Si‐O rather than Ca‐O bonds. For dehydration reactions at lower temperatures, in contrast, there are indications that Si‐O bonds may be more stable than Ca‐O bonds. The feature common to all the types of transformations discussed is probably a tendency for the oxygen atoms or ions to move as little as possible.