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Cholesterol as a Standard in the X‐Ray Diffraction of Clay Minerals
Author(s) -
Kittrick J. A.
Publication year - 1960
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1960.03615995002400010014x
Subject(s) - diffractometer , intensity (physics) , diffraction , x ray , clay minerals , x ray crystallography , materials science , mineralogy , geology , optics , crystallography , chemistry , physics , crystal structure
Cholesterol was found to be a satisfactory standard with which to align X‐ray diffractometers for work with the relatively long spacings which are the chief diagnostic characteristic of clay minerals. Sensitivity of peak intensity and position to various diffractometer adjustments was determined, and improved results with clay minerals were demonstrated. Alignment of the diffractometer at some relatively short spacing introduces the risk of obtaining a long‐spacing peak of diminished intensity or no peak at all. However, good alignment at a relatively long spacing ensures good alignment at shorter spacings as well.