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Size Distribution Analysis of Needle-Shaped Crystals

✍ Scribed by Jaroslav Nývlt; Dr. Sc.; Ing. Stanislav Žáček


Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
249 KB
Volume
27
Category
Article
ISSN
0232-1300

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✦ Synopsis


Two methods of measurement of the crystal size distribution of needle-shaped carystals are compared: direct measurement of a number of crystals on a microphotograph, which is rather tedious and time consuming, and the photosedimentometric method which is quicker, easy to perform but not so suitable for not isometric crystals. A method is described that brings results of both of these methods into agreement. The method has been verified on strongly anisometric particles of calcium sulphate.

Es wurden zwei Methoden zur Bestimmung der KristallgroDenverteilung von nadelformigen Kristallen verglichen: Direkte Messung einer grooeren Anzahl von Kristallen an einer Mikrophotographie, was eine miihsame und zeitraubende Methode reprasentiert, und die photosedimentometrische Methode, die zwar bequemer und schneller ist, aber fur nicht isometrische Kristalle weniger geeignet. Es wird eine Methode beschrieben, die die Resultate beider erwahnten Methoden zusammenbringt. Diese Methode wurde an nadelformigen Kristallen von CaSO, erfolgreich gepriift.


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