Greninger chart

In crystallography, a Greninger chart[1] /ˈɡrɛnɪŋər/ is a chart that allows angular relations between zones and planes in a crystal to be directly read from an x-ray diffraction photograph.

The Greninger chart is a simple trigonometric tool to determine g and d for a fixed sample-to-film distance.

(If one uses a 2-d detector the problem of determining g and d could be solved mathematically using the equations which generate the Greninger chart) A new chart must be generated for different sample to detector distances.

The Greninger chart gives directly the two angles needed to plot poles on the Wulff net.

For Polaroid film one must make a note of the arrangement of the face of the film in the camera.