Graphite Thin Section

Graphite in thin section thin section gigapans.

Graphite thin section. Scanning electron micrograph of graphite. For scale each image captures a central area of approximately 35 x 22 mm of the thin section. All images have two views in plane and cross polarized light.

Damage produced during thin section grinding causes speckles of light in the biotite where the crystal lattice has been deformed. This means that biotite in standard thin sections rarely goes completely extinct. This work is a part of petrology and helps to reveal the origin and evolution of the parent rock.

12 3 4 cross plane thermal conductivity of graphite thin films. All of the fkm series thin sections are uncovered and polished so quite a number have spent time in the microprobe. This is a microscopic view of a garnet grain that has grown in schist.

Garnet graphite schist is a schist that contains graphite as its dominant mineral but abundant garnet is visible and present. Graphite in graphite schist plane polars. Graphite is known to be a highly anisotropic material with an in plane thermal conductivity 2000 w m k more than two orders of magnitude higher than the cross plane thermal conductivity 6 8 w m k 93 as described in the section above.

The large black grain is the garnet the red elongate grains are mica flakes. Much care should be given to graphite specimens especially thin crystals which are fragile. Consequently 1 pixel represents about 44 μm of the sample.

Graphite is rather common mineral but fine crystals are rare. Graphite in graphite schist crossed polars. Cross polarized light field width is 6 mm.