Hydration reactivity of crystalline and vitrified diopside under hydrothermal conditions

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb05259.x· OSTI ID:5776568

Grzeszczyk, S; Szuba, J ^[1]

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1. Institute of Mineral Building Materials, Oswiecimska 21 (PL)

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{degrees}C in saturated vapor for 24 and 72 h. The progress of hydration was determined by X-ray powder diffractometry and IR spectroscopy. Results indicate 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).

• OSTI ID: 5776568
• Journal Information: Journal of the American Ceramic Society; (USA), Vol. 73:7; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIOPSIDE
X-RAY DIFFRACTION
AMORPHOUS STATE
CALCIUM SILICATES
HYDRATION
INFRARED SPECTRA
MAGNESIUM SILICATES
PHASE TRANSFORMATIONS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
MAGNESIUM COMPOUNDS
MINERALS
OXYGEN COMPOUNDS
PYROXENES
SCATTERING
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SOLVATION
SPECTRA
360602* - Other Materials- Structure & Phase Studies
400101 - Activation
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Radiometric & Radiochemical Procedures
656002 - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)