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Is coal non-foliated or foliated?
Anthracite Coal. Anthracite is a non-foliated rock produced by the metamorphism of bituminous coal.
What minerals are in anthracite coal?
2.1. 6 ANTHRACITE
| Names: anthracite, semi-anthracite coal, bituminous coal | |
|---|---|
| Chemical composition: carbon − 77%, ash − 6-16% | |
| Trace elements: sulfur − 0.23-1.2%, silica oxide − 2.2-5.4%, alumina − 2%, ferric oxide − 0.4% | |
| PHYSICAL PROPERTIES | |
| Density, g/cm3: 1.3-1.8 | Mohs hardness: 2.2-3.8 |