1.1 This test method covers a procedure for determining the relative crystallinity of zeolite sodium A (zeolite NaA) using selected peaks from the X-ray diffraction pattern of the zeolite.
1.2 The term “intensity of an X-ray powder diffraction (XRD) peak” refers to the “integral intensity,” either the area or counts under the peak or the product of the peak height and the peak width at half height.
1.3 This test method provides a number that is the ratio of intensity of portions of the XRD pattern of the sample to intensity of the corresponding portion of the pattern of a reference zeolite NaA. The intensity ratio, expressed as a percentage, is then labeled relative crystallinity of NaA.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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.
1.6 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.
ASTM D5357-19 Referenced Document
ASTM D3906 Standard Test Method for Determination of Relative X-ray Diffraction Intensities of Faujasite-Type Zeolite-Containing Materials
ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
ASTM E456 Standard Terminology for Relating to Quality and Statistics
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D5357-19 history
2019ASTM D5357-19 Standard Test Method for Determination of Relative Crystallinity of Zeolite Sodium A by X-ray Diffraction
2003ASTM D5357-03(2013) Standard Test Method for Determination of Relative Crystallinity of Zeolite Sodium A by X-ray Diffraction
2003ASTM D5357-03(2008)e1 Standard Test Method for Determination of Relative Crystallinity of Zeolite Sodium A by X-ray Diffraction
2003ASTM D5357-03 Standard Test Method for Determination of Relative Crystallinity of Zeolite Sodium A by X-Ray Diffraction
1998ASTM D5357-98 Standard Test Method for Determination of Relative Crystallinity of Zeolite Sodium A by X-Ray Diffraction