Metallurgical Coke M17 | Petrographics Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science



Frame ID: M17

Sample ID: Metallurgical Coke

Magnification: As given

Illuminator: Vertical

Objective: 50x oil

Polarizer: In

Analyzer: In

Retarder Plate: In

Filter: None

Important Features: Fine ribbon anisotropic coke texture

High Res image (300 dpi)

Description: The red and yellow speckled areas are 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 low volatile bituminous coals of V type 15.