M18
Frame ID: M18
Sample ID: Metallurgical Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: (80 daylight)
Important Features: Fine ribbon anisotropic coke texture
Description: The purple and green speckled area is cell wall material and the dark areas around the margins are vesicles. In the ASTM/U.S. Steel Carbon Form Classification this sample falls into the Ribbon Anisotropic 2.0-12.0 µ group. This type of carbon form is typical of medium volatile bituminous coals of V type 15.