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Document Type

Research

Abstract

Microscopic examination of silt grains from soils shows them to be coated with a brown, clay-like film that makes mineral identification difficult or impossible. Minerals like zircon, tourmaline, rutile and other heavy minerals are less affected by the coating than are feldspar and quartz. This latter pair make up the largest fraction of the silt and the inability to distinguish between them rapidly and easily is important. Washing with distilled water and dispersion with sodium metaphosphate failed to remove the brown coating from the silt grains. It was decided to attempt removal of the coating by ultrasonic cleaning. The instrument chosen was a Bendix UC-4 ultrasonic cleaner.

Publication Date

1957

Journal Title

Proceedings of the Iowa Academy of Science

Volume

64

Issue

1

First Page

382

Last Page

384

Copyright

© Copyright 1957 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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