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Vol 3
Pages:
319
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RUS
Research article
Articles

Effect of solution layer thickness on crystallization

Authors:
E. S. Fedorov
Date submitted:
1912-06-21
Date accepted:
1912-08-17
Date published:
1912-12-01

Abstract

In the "Annaks of Geology and Mineralogy of Russia", in the article on “Crystallization in a solid medium,” I already described the experience of converting polyhydrate magnesium sulfate hydrate, directly formed during the evaporation of the solution, into heptahydrate. At the same time, I noted that the rapidly growing needles and fibers of heptahydrate hydrate with apparently they spread at the same speed both in a free solution and penetrate the crystals of a polyhydrate hydrate (namely MgS0₄ 12 aq). It must be assumed that such an extreme slowdown in the progress of the phenomenon in extra-thin layers occurs under the influence of partial capillary forces of extension between the walls of the wedge space and its contents.

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