Original scientific paper

X-Ray Diffraction Analysis of Differently Prepared AgI. IV

R. Despotović ; Institute »Ruder Boskovic«, Zagreb, Croatia, Yugoslavia
Z. Despotović ; Institute »Ruder Boskovic«, Zagreb, Croatia, Yugoslavia
M. Mirnik ; Institute »Ruder Boskovic«, Zagreb, Croatia, Yugoslavia
B. Subotić ; Institute »Ruder Boskovic«, Zagreb, Croatia, Yugoslavia

Abstract

The cubic/hexagonal ratio of Ag! formed by dilution of a
solution of silver iodide in Na! and AgN03 solutions respectively,
and the cubic/hexagonal ratio of Ag! formed in statu nascendi in
mixed solvents has been investigated. The complex solution of
Ag! + Na! (1, 2, 3, 4, and 8 M Na!) was diluted with water to
0.01 M Na!. The formed mixtures of cubic and hexagonal Ag!
contained less cubic Ag! in systems of lower initial concentrations
of Na! as compared with those of higher initial concentrations of
Na!. By an increase in the amount of Ag! at constant Na! concentration
the amount of cubic Ag! decreased: by aging this amount
increased. By dilution of a complex solution of Ag! + AgN03 a
larger amount of cubic Ag! was formed when the initial concentration
of AgN03 was lower (1 M as compared to 8 M AgNOa).
In Ag! sols prepared in water-methanol and water-ethanol
mixtures, the amount of cubic and/or hexagonal modifications of
Ag! changes, by an increase in the percentage of alcohol, in
another way than it does in water-dioxane and water-acetone
systems. By comparing the changes of the dielectric constant of
the medium, the surface tension and the solubility of Ag! it can
be concluded that complexly dissolved Ag! is probably the factor
which most influences the formation of a a or ~ structure of Ag!.

Keywords

Hrčak ID:

197523

URI

https://hrcak.srce.hr/197523

Publication date:

10.2.1971.

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