Certification of Standard Reference Material 1976B

摘要

The National Institute of Standards and Technology (NIST) certifies a suite of Standard Reference Materials (SRMs) to address specific aspects of the performance of X-ray powder diffraction instruments. This report describes SRM 1976b, the third generation of this powder diffraction SRM. SRM 1976b consists of a sintered alumina disc, approximately 25.6 mm in diameter by 2.2 mm in thickness, intended for use in the calibration of X-ray powder diffraction equipment with respect to line position and intensity as a function of 2 theta-angle. The sintered form of the SRM eliminates the effect of sample loading procedures on intensity measurements. Certified data include the lattice parameters and relative peak intensity values from 13 lines in the 2 theta region between 20 degrees and 145 degrees using CuK alpha radiation. A NIST-built diffractometer, incorporating many advanced and unique design features was used to make the certification measurements. (C) 2015 International Centre for Diffraction Data.