Metallurgical Coke M05 | Petrographics Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science



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

High Res image (300 dpi)

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.