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Separation and identification of minerals from Northern Great Plains Province lignite.
Paulson LE; Beckering W; Fowkes WW
Fuel 1972 Jul; 51(3):224-227
Minerals were separated from nine lignite samples on the basis of specific gravity differences by float/sink of fine particles in carbon tetrachloride. Examination of the sink fractions showed the presence of nacrite, barite, pyrite, hematite, quartz, calcite, gypsum, and fragments of a mixture of a-quartz and nacrite. No separable minerals were found in which sodium was a major constituent.
OP; Journal Article
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Page last reviewed: October 8, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division