M05
Frame ID: M05
Sample ID: Metallurgical Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Fine circular anisotropic coke texture
Description: The red and yellow speckled area is cell wall material and the dark circular areas are vesicles. At the top right of the frame there is an isotropic inert fragment. In the ASTM/U.S. Steel Carbon Form Classification this sample falls into the Circular Anisotropic 0.5-1.0 µ group. This type of carbon form is typical of high volatile bituminous coals of V type 9.