ASTM D5357-98
Historical Standard: ASTM D5357-98 Standard Test Method for Determination of Relative Crystallinity of Zeolite Sodium A by X-Ray Diffraction
SUPERSEDED (see Active link, below)
ASTM D5357
1. Scope
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 of 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 '% XRD intensity/NaA.'
1.4 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D3906 Test Method for Determination of Relative X-ray Diffraction Intensities of Faujasite-Type Zeolite-Containing Materials
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
crystallinity; X-ray diffraction; zeolite sodium A; Crystallinity; Relative crystallinity; X-ray diffraction analysis; Zeolite catalysts;
ICS Code
ICS Number Code 71.040.30 (Chemical reagents)
DOI: 10.1520/D5357-98
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