• July 17, 2026
Dull coal

This article examines the topic of dull coal — a descriptive classification of coal distinguished by its matte appearance, particular physical and chemical characteristics, and specific industrial uses. Dull coal…

  • July 11, 2026
Fusain-rich coal

Fusain-rich coal is a distinctive variety of coal in which fragments of fossil charcoal, known collectively as fusain, are abundant. These coals preserve a record of ancient paleo-wildfires and the…

  • July 7, 2026
Inertinite-rich thermal coal

This article examines inertinite-rich thermal coal: its geological origins, where it is found and mined, its physical and chemical properties, industrial uses, economic importance, market dynamics and environmental implications. The…

  • July 3, 2026
Coal with high inertinite content

Coal characterized by a high content of inertinite macerals represents a distinct and economically important subset of the world’s coals. These coals carry a record of past environmental conditions, pose…

  • June 24, 2026
Low-plasticity coal

This article explores the characteristics, geological occurrence, economic significance and industrial uses of low-plasticity coal. Low-plasticity coal is a distinct category in coal petrography and technological classification: it does not…

  • June 21, 2026
Non-swelling coal

This article examines the properties, distribution, economic importance and industrial uses of non-swelling coal — a category of coal defined by its limited tendency to cake or expand when heated.…

  • June 20, 2026
Pavlograd Coal Mines – Ukraine

The Pavlograd coal mining area, located in the Dnipropetrovsk region of eastern Ukraine, is one of the country’s historically important coal-producing districts. For well over a century the mines around…

  • June 20, 2026
Low-swelling coal

This article explores the characteristics, occurrence, extraction, economic role and industrial uses of low-swelling coal. Low-swelling coals form an important segment of the global coal resource base. Although they are…

  • June 9, 2026
Composite coal

This article examines the subject commonly referred to as composite coal — a term that can denote both geological composite samples and engineered blends of different coal types used to…

  • June 8, 2026
Synthetic coal

This article examines the phenomenon commonly referred to as synthetic coal alongside conventional coal. It covers geological occurrence, extraction methods, economic and statistical context, industrial uses, environmental consequences, and emerging…