Figure 7
From: Garnet, the archetypal cubic mineral, grows tetragonal
Petrographic and electron microscopic images of an anisotropic garnet from Cazadero. (a) Crossed-polarized optical photomicrograph of garnet showing well-developed sector zoning. (b) Phase recognition map from same field of view as (a) indexed with electron backscatter diffraction. Red = garnet; blue = glaucophane; green = quartz. (c) Texture component map (0–2.5°) with a rainbow color scheme reveals misorientation from the mean crystallographic orientation of the grain. Blue-green domains are close to the average orientation, while warm colors represent higher degrees of misorientation from the grain average. Apart from misorientation related to a fracture on top left, apparent misorientation from the grain average is an artefact due to changes in the unit cell parameters related to intracrystalline chemical variation.
