M01
Frame ID: M01
Sample ID: Metallurgical Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Isotropic coke texture
Description: The red isotropic area is coke cell wall material and the dark circular areas are vesicles. In the ASTM/U.S. Steel Carbon Form Classification this sample falls into the Isotropic O µ group. This type of carbon form is typical of high volatile bituminous coals of V type 7 or lower.