ISO 7404-4:2025
Current
The latest, up-to-date edition.
Coal — Methods for petrographic analysis — Part 4: Method of determining microlithotype, carbominerite and minerite composition
Hardcopy , PDF
English
27-10-2025
This document specifies a method, using a graticule with 20crossline 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.
| DocumentType |
Standard
|
| Pages |
9
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Supersedes |
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