Metallurgical Coke M20 | Petrographics Atlas | SIU

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Crelling's Petrographic Atlas of Coals and Carbons

College of Science

M20

m20

Frame ID: M20

Sample ID: Metallurgical Coke

Magnification: As given

Illuminator: Vertical

Objective: 50x oil

Polarizer: In

Analyzer: In

Retarder Plate: In

Filter: (80 daylight)

Important Features: Medium ribbon anisotropic coke texture

High Res image (300 dpi)

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 Circular Anisotropic 12.0-25.0 µ group. This type of carbon form is typical of low volatile bituminous coals of V type 16.