Certification of Standard Reference Material 660b

Published

June 1, 2011

Author(s)

David R. Black, Donald A. Windover, Albert Henins, James J. Filliben, James P. Cline

Abstract

The National Institute of Standards and Technology (NIST) certifies a suite of Standard Reference Materials (SRMs) to address specific aspects of instrument performance of powder diffractometers. This report describes SRM 660b, the third generation of this powder diffraction SRM used primarily for determination of the Instrument Profile Function (IPF). It is certified with respect to lattice parameter. It consists of approximately 6 g LaB6 powder prepared using a 11B isotopically enriched precursor material so as to render the SRM applicable to the neutron diffraction community. The microstructure of the LaB6 powder was engineered to produce a crystallite size above that where size broadening is typically observed and to minimize the crystallographic defects that lead to strain broadening. A NIST built diffractometer, incorporating many advanced design features, was used to certify the lattice parameter of the LaB6 powder. Both Type A, statistical, and Type B, systematic, errors have been assigned to yield a certified value for the lattice parameter of a = 0.415691(8) nm at 22.5 ˚C.

Citation

Powder Diffraction

Pub Type

Journals

Keywords

certification, diffractometer, lattice parameter, standard reference material, X-ray diffraction

Citation

Black, D. , Windover, D. , Henins, A. , Filliben, J. and Cline, J. (2011), Certification of Standard Reference Material 660b, Powder Diffraction (Accessed April 19, 2024)