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ISO 7404-3:1994
M00000397
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ISO 7404-3:1994 Methods for the petrographic analysis of bituminous coal and anthracite -- Part 3: Method of determining maceral group composition
standard by International Organization for Standardization, 10/01/1994
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Cancels and replaces the first edition (1984). Specifies a method of determining the proportions of the maceral groups (and the minerals if desired) in coals. Concerned only with determinations made on polished particulate blocks using reflected white light. Not concerned with the determination of the proportions of naturally occurring maceral associations.