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Photomicrograph Atlas

Inertodetrinite in Metallurgical Bituminous Coals

Inertodetrinite: An inertinite maceral occurring as individual, angular, clastic fragments incorporated within the matrix of other macerals (commonly vitrinite) or minerals, and in the size range from 2 to 50 um (ASTM 2008).

Representative examples of macerals are labeled on each photomicrograph. Click on the thumbnail images for a larger and more detailed view. Use the "back" button on your browser to return to the Atlas:

Photomicrograph of borderline high volatile A – medium volatile bituminous coal from West Virginia with a mean maximum reflectance of 1.15%. Macerals shown include inertodetrinite, vitrinite, micrinite, and sporinite.

Photomicrograph of borderline high volatile A – medium volatile bituminous coal from West Virginia with a mean maximum reflectance of 1.15%. Macerals shown include inertodetrinite and sporinite.

Photomicrograph of borderline high volatile A – medium volatile bituminous coal from West Virginia with a mean maximum reflectance of 1.15%. Macerals shown include inertodetrinite and fusinite.

Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include inertodetrinite, sporinite, and semifusinite.

Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 1.04%. Macerals shown include inertodetrinite, vitrinite, micrinite, and sporinite.

Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include inertodetrinite, micrinite, sporinite, and semifusinite.

Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include inertodetrinite, micrinite, sporinite, fusinite, and semifusinite.

Photomicrograph of high volatile A bituminous coal from West Virginia with a mean maximum reflectance of 0.97%. Macerals shown include inertodetrinite, vitrinite, fusinite, and semifusinite.

Return to Photomicrograph Atlas index

Reference

American Society for Testing and Materials (ASTM), 2008, D 2799-05a Standard Test Method for Microscopical Determination of the Maceral Composition of Coal: Annual Book of ASTM Standards, Petroleum Products, Lubricants, and Fossil Fuels, v.05.06, Gaseous Fuels; Coal and Coke, [p 349-352].

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