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Hard coal

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  1. ^ Dear Editors - please do not link articles about Turkey to this while it redirects to anthracite. According to the Turkish government hard coal means bituminous coal not anthracite.[1]
  1. ^ "Coal". Republic of Türkiye Ministry of Energy and Natural Resources. Retrieved 2025-03-05. Peat, lignite, sub-bituminous coal, bituminous coal (hard coal), anthracite and graphite are formed by turning into each other.