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ISO 7404-4:2025

Coal - Methods for petrographic analysis - Part 4: Method of determining microlithotype, carbominerite and minerite composition
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ISO 7404-4:2025

Coal - Methods for petrographic analysis - Part 4: Method of determining microlithotype, carbominerite and minerite composition

ISO 7404-4:2025

This document specifies a method, using a graticule with 20 crossline intersections, for determining the proportions of microlithotypes, carbominerite and minerite in coals. It applies only to determinations made on polished particulate blocks using reflected white light. Additional blue, blue-violet or UV light excitation for better identification of liptinite in fluorescence can be used especially for low rank coals.

SDO ISO: International Organization for Standardization
Document Number ISO 7404
Publication Date Not Available
Language en - English
Page Count 16
Revision Level
Supercedes
Committee ISO/TC 27/SC 5
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