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Certification of standard reference material 1878b respirable α-quartz

Published online by Cambridge University Press:  09 June 2016

David R. Black ,
Marcus H. Mendenhall ,
Pamela S. Whitfield ,
Donald Windover ,
Albert Henins ,
James Filliben  and
James P. Cline
David R. Black*
Affiliation:
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Marcus H. Mendenhall
Affiliation:
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Pamela S. Whitfield
Affiliation:
Oak Ridge National Lab, Spallation Neutron Source, PO Box 2008, MS-6475, Oak Ridge, Tennessee 37831
Donald Windover
Affiliation:
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Albert Henins
Affiliation:
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
James Filliben
Affiliation:
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
James P. Cline
Affiliation:
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
*
a) Author to whom correspondence should be addressed. Electronic mail: david.black@nist.gov
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Abstract

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 1878b, the third generation of this powder diffraction SRM. SRM 1878b is intended for use in the preparation of calibration standards for the quantitative analyses of α-quartz by X-ray powder diffraction in accordance to National Institute for Occupational Safety and Health Analytical Method 7500, or equivalent. A unit of SRM 1878b consists of approximately 5 g of α-quartz powder bottled in an argon atmosphere. It is certified with respect to crystalline phase purity, or amorphous phase content, and lattice parameter. Neutron powder diffraction, both time of flight and constant wavelength, was used to certify the phase purity using SRM 676a as an internal standard. A NIST-built diffractometer, incorporating many advanced design features was used for certification measurements for lattice parameters.

Keywords

standard reference materialX-ray diffractioncertificationlattice parameterdiffractometer

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Type
Technical Articles
Information
Powder Diffraction , Volume 31 , Issue 3 , September 2016 , pp. 211 - 215
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Copyright
Copyright © International Centre for Diffraction Data 2016 

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