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:

1971-01-01

Pagination or Media Count:

8.0

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