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An ultrasonic probe for the extraction of microscopic quantities of minerals for X-ray work

Published online by Cambridge University Press:  05 July 2018

Veselin Kovachev  and
Strashimir Strashimirov
Veselin Kovachev
Affiliation:
University of Mining and Geology “St. Ivan Rilski”, Sofia 1100, Bulgaria
Strashimir Strashimirov
Affiliation:
University of Mining and Geology “St. Ivan Rilski”, Sofia 1100, Bulgaria
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Abstract

The instrumentation and procedure is described for the extraction of very small and pure samples from polished mounts and thin sections of minerals, for X-ray analysis and other micro-analytical techniques. It uses a stand-mounted, tunable ultrasonic probe (400 W/15–50 kHz) inclined at 45°C to a microscope stage. The tip of the probe, usually a steel needle, is located on the desired mineral and an appropriate ultrasonic frequency is selected. Very fine powders are produced from grains as small as 0.01–0.005 mm. A distinct advantage of this technique is that, as different minerals powder at different rates and different frequencies, it is possible to separate a single mineral from an intergrowth of two or more minerals.

Keywords

K-ray analysisDebye Scherrerultrasonic probemineral separation
Type
Mineralogy
Information
Mineralogical Magazine , Volume 60 , Issue 402 , October 1996 , pp. 829 - 831
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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References

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