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  • ASTM
    D934-22 Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction
    Edition: 2022
    $144.00
    Unlimited Users per year

Description of ASTM-D934 2022

ASTM D934-22

Active Standard: Standard Practices for Identification of Crystalline Compounds in Water-Formed Deposits By X-Ray Diffraction




ASTM D934

Scope

1.1 These practices provide for X-ray diffraction analysis of powdered crystalline compounds in water-formed deposits. Two are given as follows:

 

Sections

Practice A—Camera

12 to 21

Practice B—Diffractometer

22 to 30

1.2 Both practices yield qualitative identification of crystalline components of water-formed deposits for which X-ray diffraction data are available or can be obtained. Greater difficulty is encountered in identification when the number of crystalline components increases.

1.3 Amorphous phases cannot be identified without special treatment. Oils, greases, and most organic decomposition products are not identifiable.

1.4 The sensitivity for a given component varies with a combination of such factors as density, degree of crystallization, particle size, coincidence of strong lines of components and the kind and arrangement of the atoms of the components. Minimum percentages for identification may therefore range from 1 % to 40 %.

1.5 The values stated in SI units are to be regarded as standard. The values listed in parenthesis are for information only.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8 and Note 20.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


Keywords

crystallographic examination; deposits; metal oxides; scale; X-ray diffraction;


ICS Code

ICS Number Code 13.060.30 (Sewage water)


DOI: 10.1520/D0934-22



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