Metallurgical Coke M06 | Petrographics Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science



Frame ID: M06

Sample ID: Metallurgical Coke

Magnification: As given

Illuminator: Vertical

Objective: 50x oil

Polarizer: In

Analyzer: In

Retarder Plate: In

Filter: Blue (80 daylight)

Important Features: Fine circular anisotropic coke texture

High Res image (300 dpi)

Description: The purple and green speckled area is cell wall material and the dark circular areas at the lower left are vesicles. 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.