Accession Number : AD0617561

Title :   THE HYDRIDE METHOD FOR THE RAPID DETERMINATION OF 'FREE' WATER IN MINERALS.

Descriptive Note : Scientific rept.,

Corporate Author : COLUMBIA UNIV NEW YORK

Personal Author(s) : Guven,Necip ; kerr,Paul F.

Report Date : FEB 1965

Pagination or Media Count : 21

Abstract : A rapid procedure for the determination of 'free' water in minerals is described which makes use of the reaction: CaH2 + 2H2O yields Ca(OH)2 + 2H2. The pressure change caused by H2 in the reaction is measured and the corresponding moisture content calculated. Parallel determinations using oven drying were made in order to show the differences between the two methods. The hydride procedure measures only 'free' water whereas the conventional heating method includes both 'free' water and water of 'activated' adsorption and/or water of hydration involving adsorption energies greater than 5-10 Kcals per mole. (Author)

Descriptors :   (*MINERALS, WATER), (*HYDRATES, CHEMICAL ANALYSIS), CALCIUM COMPOUNDS, HYDRIDES, HYDROXIDES, MOISTURE, SOILS, CHEMISORPTION, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE