Accession Number : AD0719695

Title :   Preparation of Samples for X-Ray Powder Diffractometry Using a Hydrophobic Amorphous Silica.

Descriptive Note : Special publication,

Corporate Author : EDGEWOOD ARSENAL MD

Personal Author(s) : Klein,Joel M. ; Wilcox,James D. ; Eriks,Klaas

Report Date : JAN 1971

Pagination or Media Count : 8

Abstract : A novel procedure for preparing powder samples for use in an x-ray powder diffractometer has been developed. The crystalline material is ground in the presence of a hydrophobic silica aerogel and then pressed into pellets at 10,000 psi. The advantages of this procedure are: The silica aerogel functions as a grinding aid, improving the grinding of the material; The powder is relatively hydrophobic and not easily affected by atmospheric moisture; and The pellet formed is very flat and has a high density of randomly oriented crystallites per unit area. (Author)

Descriptors :   (*X RAY DIFFRACTION, PELLETS), POWDERS, SILICON DIOXIDE, GRINDING, PARTICLE SIZE

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE