ISO 7404-4:1988
Methods for the petrographic analysis of bituminous coal and anthracite; part 4: method of determining microlithotype, carbominerite and minerite composition

Standard No.

ISO 7404-4:1988

Release Date

1988

Published By

International Organization for Standardization (ISO)

Status

Be replaced

Replace By

ISO 7404-4:2017

Latest

ISO 7404-4:2017

Scope

This part of ISO 7404 applies only to determinations made on polished particular blocks using reflected white ligth. The examination is carried out by using reflected ligth microscope and point count procedure. The microlithotypes are identified from their maceral composition under an immersion medium. The proportions of the macerals are determined using a graticule having a grid with 20 points of intersection.

ISO 7404-4:1988 history

• 2017 ISO 7404-4:2017 Methods for the petrographic analysis of coals — Part 4: Method of determining microlithotype, carbominerite and minerite composition
• 1988 ISO 7404-4:1988 Methods for the petrographic analysis of bituminous coal and anthracite; part 4: method of determining microlithotype, carbominerite and minerite composition