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Clouding of Pressed Potassium Bromide Powder

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Abstract:

The monomolecular layer of water adsorbed on KBr particles is responsible for clouding of disks pressed from finely ground powder. Cloudiness is caused by formation of a multitude of cracks in the disk. The initial cracking can be observed with a low power optical microscope and the extensive cracking in the fully cloudy region is observable with a scanning electron microscope. It is suggested that adsorbed water promotes recrystallization, generating weak zones in the workhardened, elastically stressed disk which fails by cracking.

Keywords: Clouding; Pressed potassium bromide; Water

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370272774352236

Affiliations: Research Department, Organic Chemistry Branch, Code 6056, Naval Weapons Center, China Lake, California 93555

Publication date: March 1, 1972

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