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Hydration Reactivity of Crystalline and Vitrified Diopside under Hydrothermal Conditions
Author(s) -
Grzeszczyk Stefania,
Szuba Jadwiga
Publication year - 1990
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.1151-2916.1990.tb05259.x
Subject(s) - diopside , autoclave , hydrothermal circulation , mineralogy , silicate , materials science , hydrate , reactivity (psychology) , wollastonite , chemical engineering , chemistry , metallurgy , raw material , medicine , alternative medicine , organic chemistry , pathology , engineering
Hydration reactivity of diopside in both the crystalline and amorphous (glassy) phase was studied under hydrothermal conditions. Samples were treated in an autoclave at 200°C in saturated vapor for 24 and 72 h. The progress of hydration was determined by X‐ray powder diffractometry and IR spectroscopy. Results indicated that crystalline diopside possessed poor hydraulic activity. However, once vitrified it proved to be much more reactive. The principal hydration products found for the glassy diopside after 24 and 72 h of treatment were calcium silicate hydrate (xonotlite) and magnesium silicate hydrates (chrysotile and tremolite).