Accession Number : AD0608120

Title :   THE MECHANICS OF IRON INHIBITION DURING DISSOLUTION OF LITHIUM FLUORIDE CLEAVAGES.

Descriptive Note : Technical rept. no. 3,

Corporate Author : MCMASTER UNIV HAMILTON (ONTARIO)

Personal Author(s) : Baskin,Marjorie S. ; ives,M. B.

Report Date : SEP 1964

Pagination or Media Count : 34

Abstract : Radiotracers of iron are used to obtain adsorption isotherms for iron adsorbed on lithium fluoride surfaces from dilute solutions of ferric chloride. The isotherms are related to the observed etch morphologies and substantiate the argument that the condition for good crystallographically defined etch features is achieved by 'monokink' adsorption of iron on the surface. Two distinct mechanisms are proposed for the effect of iron on the morphologies. At low iron concentrations the adsorption of iron at kinks is rate controlling, but at higher concentrations diffusion control becomes increasingly dominant. It is suggested that the diffusion barriers are increased by ferric ion complexes in solution. Isotherms determined under the steady state conditions provided by solutions saturated with lithium fluoride are more reproducible and applicable to adsorption theories than those determined from etchants. Beta-track autoradiography and low-background counter methods are compared. (Author)

Descriptors :   (*IRON COMPOUNDS, ADSORPTION), (*LITHIUM COMPOUNDS, FLUORIDES), (*SINGLE CRYSTALS, LITHIUM COMPOUNDS), INHIBITION, SURFACES, CHLORIDES, IRON, CRYSTAL DEFECTS, ETCHED CRYSTALS

Distribution Statement : APPROVED FOR PUBLIC RELEASE