view article
Figure 4
Schemes of three types of configuration in a petrographic microscope; the arrows on polarizers indicate their polarization directions. Left, plane polarized light (PPL); middle, crossed Nicols (XPL); right, parallel Nicols. Below each scheme is the resulting petrographic image of a rock containing quartz and biotite.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 59| Part 1| February 2026| Pages 239-247
https://doi.org/10.1107/S1600576725010635
Follow J. Appl. Cryst.
Sign up for e-alerts
E-alerts
Follow J. Appl. Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS