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brown coal
Description Coals with a gross calorific value (moist, ash- free basis) less than 24 MJ/ kg and a vitrinite mean random reflectance less than 0.6 per cent. Brown coal comprises sub-bituminous coal and lignite (15).
Source United Nations, International Recommendations for Energy Statistics. Statistical Papers, Series M, No. 93 (United Nations publication, Sales No. E.14.XVII.11).
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