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B51-14 (R2019) – Boiler, pressure vessel, and pressure piping code

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ISO 7404-4:2025

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

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This publication was last reviewed and confirmed in 2025.

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

SKU: cf96c75c7ac3 Category:

Description

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.

Edition

3

Published Date

2026-06-19

Status

PUBLISHED

Pages

9

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

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.

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