Dark field images.

Abstract

<p>(a) bright-field and (b) dark-field images (using 002 reflections) of same region in a sample of human bone cut parallel to the long axis of the bone. Bragg reflections from the 002 planes of HA are concentrated along the long dark structures, showing that they contain crystals of HA. Note lack of 002 reflections from gap zones. c) Dark field image of a second area showing Moiré fringes in area between lanes of mineral structures that are not visible in this image.</p