etch figures

Updated About encyclopedia.com content Print Article Share Article
views updated

etch figures (etch marks) Pits (etchings), regular in shape, which may develop in certain directions consistent with the orientation of the symmetry elements for the crystal as a whole when crystal faces are treated with suitable chemical reagents. These etch figures may therefore be used to assign crystals to their appropriate crystal systems.

More From Encyclopedia.com


MORE ON THIS TOPIC